Diagnostic Information

OBD - General Information

What is OBD? DTC Format OBD Troublecodes OBD Monitors / Modes Connector Acronyms

OBD stands for "on-board diagnostics", a computer-based system built into all model year (MY) 1996 and newer light-duty cars and trucks. OBD monitors the performance of some of the engines' major components, including individual emission controls. The system provides owners with an early warning of malfunctions by way of a dashboard "Check Engine" light (also known as a Malfunction Indicator Light or MIL, for short). By giving vehicle owners this early warning, OBD protects not only the environment but also consumers, identifying minor problems before they become major repair bills.


For example, by identifying a relatively inexpensive repair like the replacement of a malfunctioning oxygen sensor, OBD can save the owner the cost of replacing the catalytic converter later. By helping to ensure that the vehicle operates within its original design specifications, OBD can help save consumers money by making sure gasoline isn't wasted as a result of, for example, a loose gas cap or incomplete combustion. OBD stores information about the malfunction detected and actually helps the repair technician to diagnose and fix the vehicle. When OBD checks are performed as part of a state's Inspection and Maintenance (I/M) program, they can help save consumers time, taking on average five minutes or less in centralized programs.


Source: http://www.epa.gov/obd/

A DTC is made up of 5 digits.

Example:    P0101

1st digit B-Body
C-Chassis,
P-Powertrain
U-Network
2nd digit 0 Generic
1 Manufacturer specific
3rd digit 1 Air & Fuel Metering
2 Air & Fuel Metering  (Injector Circuit)
3 Ignition System or Misfire
4 Auxiliary Emissions Controls
5 Vehicle Speed Controls And Idle Control System
6 Computer Output Circuit
7 Transmission
8 Transmission
4th & 5th digit Identifies what section of the system is malfunctioning
P01XX Fuel and Air Metering
P0100 Mass or Volume Air flow Circuit Malfunction
P0101 Mass or Volume Air flow Circuit Range/Performance Problem
P0102 Mass or Volume Air Flow Circuit low Input
P0103 Mass or Volume Air flow Circuit High Input
P0104 Mass or Volume Air flow Circuit Intermittent
P0105 Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input
P0109 Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
P010A Mass or Volume Air Flow Sensor "B" Circuit
P010B Mass or Volume Air Flow Sensor "B" Circuit Range/Performance
P010C Mass or Volume Air Flow Sensor "B" Circuit Low
P010D Mass or Volume Air Flow Sensor "B" Circuit High
P010F Mass or Volume Air Flow Sensor A/B Correlation
P0110 Intake Air Temperature Circuit Malfunction
P0111 Intake Air Temperature Circuit Range/Performance Problem
P0112 Intake Air Temperature Circuit Low Input
P0113 Intake Air Temperature Circuit High Input
P0114 Intake Air Temperature Circuit Intermittent
P0115 Engine Coolant Temperature Circuit Malfunction
P0116 Engine Coolant Temperature Circuit Range/Performance Problem
P0117 Engine Coolant Temperature Circuit Low Input
P0118 Engine Coolant Temperature Circuit High Input
P0119 Engine Coolant Temperature Circuit Intermittent
P0120 Throttle Pedal Position Sensor/Switch A Circuit Malfunction
P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
P0122 Throttle/Pedal Position Sensor/Switch A Circuit Low Input
P0123 Throttle/Pedal Position Sensor/Switch A Circuit High Input
P0124 Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control
P0126 Insufficient Coolant Temperature for Stable Operation
P0127 Intake Air Temperature Too High
P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0130 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0132 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
P0137 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
P0140 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0142 O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)
P0143 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)
P0144 O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
P0145 O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)
P0146 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)
P0147 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 3)
P0148 Fuel Delivery Error
P014C O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1
P014E O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 1
P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P0151 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)
P0152 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
P0153 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1)
P0154 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
P0156 O2 Sensor Circuit Malfunction (Bank 2 Sensor 2)
P0157 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
P0158 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)
P0159 O2 Sensor Circuit Slow Response (Bank 2 Sensor 2)
P0160 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)
P0161 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)
P0162 O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)
P0163 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)
P0164 O2 Sensor Circuit High Voltage (Bank 2 Sensor 3)
P0165 O2 Sensor Circuit Slow Response (Bank 2 Sensor 3)
P0166 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3)
P0167 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 3)
P0170 Fuel Trim Malfunction (Bank 1)
P0171 System Too Lean (Bank 1)
P0172 System Too Rich (Bank 1)
P0173 Fuel Trim Malfunction (Bank 2)
P0174 System Too Lean (Bank 2)
P0175 System Too Rich (Bank 2)
P0176 Fuel Composition Sensor Circuit Malfunction
P0177 Fuel Composition Sensor Circuit Range/Performance
P0178 Fuel Composition Sensor Circuit Low Input
P0179 Fuel Composition Sensor Circuit High Input
P0180 Fuel Temperature Sensor A Circuit Malfunction
P0181 Fuel Temperature Sensor A Circuit Performance
P0182 Fuel Temperature Sensor A Circuit low Input
P0183 Fuel Temperature Sensor A Circuit High Input
P0184 Fuel Temperature Sensor A Circuit Intermittent
P0185 Fuel Temperature Sensor B Circuit Malfunction
P0186 Fuel Temperature Sensor B Circuit Range/Performance
P0187 Fuel Temperature Sensor U Circuit Low Input
P0188 Fuel Temperature Sensor B Circuit High Input
P0189 Fuel Temperature Sensor B Circuit Intermittent
P018A Fuel Pressure Sensor "B" Circuit
P018B Fuel Pressure Sensor "B" Circuit Range/Performance
P018C Fuel Pressure Sensor "B" Circuit Low
P018D Fuel Pressure Sensor "B" Circuit High
P0190 Fuel Rail Pressure Sensor Circuit Malfunction
P0191 Fuel Rail Pressure Sensor Circuit Range/Performance
P0192 Fuel Rail Pressure Sensor Circuit Low Input
P0193 Fuel Rail Pressure Sensor Circuit High Input
P0194 Fuel Rail Pressure Sensor Circuit Intermittent
P0195 Engine Oil Temperature Sensor Malfunction
P0196 Engine Oil Temperature Sensor Range/Performance
P0197 Engine Oil Temperature Sensor Low
P0198 Engine Oil Temperature Sensor High
P0199 Engine Oil Temperature Sensor Intermittent

P02XX Fuel and Air Metering
P0200 Injector Circuit Malfunction
P0201 Injector Circuit Malfunction - Cylinder 1
P0202 Injector Circuit Malfunction - Cylinder 2
P0203 Injector Circuit Malfunction - Cylinder 3
P0204 Injector Circuit Malfunction - Cylinder 4
P0205 Injector Circuit Malfunction - Cylinder 5
P0206 Injector Circuit Malfunction - Cylinder 6
P0207 Injector Circuit Malfunction - Cylinder 7
P0208 Injector Circuit Malfunction - Cylinder 8
P0209 Injector Circuit Malfunction - Cylinder 9
P0210 Injector Circuit Malfunction - Cylinder 10
P0211 Injector Circuit Malfunction - Cylinder 11
P0212 Injector Circuit Malfunction - Cylinder 12
P0213 Cold Start Injector 1 Malfunction
P0214 Cold Start Injector 2 Malfunction
P0215 Engine Shutoff Solenoid Malfunction
P0216 Injection Timing Control Circuit Malfunction
P0217 Engine Overtemp Condition
P0218 Transmission Over Temperature Condition
P0219 Engine Over Speed Condition
P0220 Throttle/Pedal Position Sensor/Switch B Circuit Malfunction
P0221 Throttle/pedal Position Sensor/Switch B Circuit Range/Performance Problem
P0222 Throttle/pedal Position Sensor/Switch B Circuit Low Input
P0223 Throttle/Pedal Position Sensor/Switch B Circuit High Input
P0224 Throttle/Pedal Position Sensor/Switch B Circuit Intermittent
P0225 Throttle/Pedal Position Sensor/Switch C Circuit Malfunction
P0226 Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance Problem
P0227 Throttle/Pedal Position Sensor/Switch C Circuit Low Input
P0228 Throttle/Pedal Position Sensor/Switch C Circuit High Input
P0229 Throttle/Pedal Position Sensor/Switch C Circuit Intermittent
P0230 Fuel Pump Primary Circuit Malfunction
P0231 Fuel Pump Secondary Circuit Low
P0232 Fuel Pump Secondary Circuit High
P0233 Fuel Pump Secondary Circuit Intermittent
P0234 Engine Overboost Condition
P0235 Turbocharger Boost Sensor A Circuit Malfunction
P0236 Turbocharger Boost Sensor A Circuit Range/Performance
P0237 Turbocharger Boost Sensor A Circuit Low
P0238 Turbocharger Boost Sensor A Circuit High
P0239 Turbocharger Boost Sensor B Circuit Malfunction
P0240 Turbocharger Boost Sensor B Circuit Range/Performance
P0241 Turbocharger Boost Sensor B Circuit Low
P0242 Turbocharger Boost Sensor B Circuit High
P0243 Turbocharger Wastegate Solenoid A Malfunction
P0244 Turbocharger Wastegate Solenoid A Range/Performance
P0245 Turbocharger Wastegate Solenoid A low
P0246 Turbocharger Wastegate Solenoid A High
P0247 Turbocharger Wastegate Solenoid B Malfunction
P0248 Turbocharger Wastegate Solenoid B Range/Performance
P0249 Turbocharger Wastegate Solenoid B Low
P0250 Turbocharger Wastegate Solenoid B High
P0251 Injection Pump Fuel Metering Control "A" Malfunction (Cam/Rotor/Injector)
P0252 Injection Pump Fuel Metering Control "A" Range/Performance (Cam/Rotor/Injector)
P0253 Injection Pump Fuel Metering Control "A" Low (Cam/Rotor/Injector)
P0254 Injection Pump Fuel Metering Control "A" High (Cam/Rotor/Injector)
P0255 Injection Pump Fuel Metering Control "A" Intermittent (Cam/Rotor/Injector)
P0256 Injection Pump Fuel Metering Control "B" Malfunction (Cam/Rotor/Injector)
P0257 Injection Pump Fuel Metering Control "B" Range/Performance (Cam/Rotor/Injector)
P0258 Injection Pump Fuel Metering Control "B" Low (Cam/Rotor/Injector)
P0259 Injection lump Fuel Metering Control "B" High (Cam/Rotor/Injector)
P0260 Injection Pump Fuel Metering Control "B" Intermittent (Cam/Rotor/Injector)
P0261 Cylinder 1 Injector Circuit Low
P0262 Cylinder 1 Injector Circuit High
P0263 Cylinder 1 Contribution/Balance Fault
P0264 Cylinder 2 Injector Circuit Low
P0265 Cylinder 2 Injector Circuit High
P0266 Cylinder 2 Contribution/Balance Fault
P0267 Cylinder 3 Injector Circuit Low
P0268 Cylinder 3 Injector Circuit High
P0269 Cylinder 3 Contribution/Balance Fault
P0270 Cylinder 4 Injector Circuit Low
P0271 Cylinder 4 Injector Circuit High
P0272 Cylinder 4 Contribution/Balance Fault
P0273 Cylinder 5 Injector Circuit Low
P0274 Cylinder 5 Injector Circuit High
P0275 Cylinder 5 Contribution/Balance Fault
P0276 Cylinder 6 Injector Circuit Low
P0277 Cylinder 6 Injector Circuit High
P0278 Cylinder 6 Contribution/Balance Fault
P0279 Cylinder 7 Injector Circuit Low
P0280 Cylinder 7 Injector Circuit High
P0281 Cylinder 7 Contribution/Balance Fault
P0282 Cylinder 8 Injector Circuit Low
P0283 Cylinder 8 Injector Circuit High
P0284 Cylinder 8 Contribution/Balance Fault
P0285 Cylinder 9 Injector Circuit Low
P0286 Cylinder 9 Injector Circuit High
P0287 Cylinder 9 Contribution/Balance Fault
P0288 Cylinder 10 Injector Circuit Low
P0289 Cylinder 10 Injector Circuit High
P0290 Cylinder 10 Contribution/balance Fault
P0291 Cylinder 11 Injector Circuit Low
P0292 Cylinder 11 Injector Circuit High
P0293 Cylinder 11 Contribution/balance Fault
P0294 Cylinder 12 Injector Circuit Low
P0295 Cylinder 12 Injector Circuit High
P0296 Cylinder 12 Contribution/Balance Fault
P0299 Turbocharger/Supercharger "A" Underboost Condition
P029C Cylinder 1 - Injector Restricted
P02A0 Cylinder 2 - Injector Restricted
P02A4 Cylinder 3 - Injector Restricted
P02A8 Cylinder 4 - Injector Restricted
P02AC Cylinder 5 - Injector Restricted
P02B0 Cylinder 6 - Injector Restricted
P02E0 Diesel Intake Air Flow Control Circuit/Open
P02E1 Diesel Intake Air Flow Control Performance
P02E2 Diesel Intake Air Flow Control Circuit Low
P02E3 Diesel Intake Air Flow Control Circuit High

P03XX Ignition System or Misfire
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0307 Cylinder 7 Misfire Detected
P0308 Cylinder 8 Misfire Detected
P0309 Cylinder 9 Misfire Detected
P0310 Cylinder 10 Misfire Detected
P0311 Cylinder 11 Misfire Detected
P0312 Cylinder 12 Misfire Detected
P0320 Ignition/Distributor Engine Speed Input Circuit Malfunction
P0321 Ignition/Distributor Engine Speed Input Circuit Range/Performance
P0322 Ignition/Distributor Engine Speed Input Circuit No Signal
P0323 Ignition/Distributor Engine Speed Input Circuit Intermittent
P0325 Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)
P0327 Knock Sensor 1 Circuit low Input (Bank 1 or Single Sensor)
P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
P0329 Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor)
P0330 Knock Sensor 2 Circuit Malfunction (Bank 2)
P0331 Knock Sensor 2 Circuit Range/Performance (Bank 2)
P0332 Knock Sensor 2 Circuit Low Input (Bank 2)
P0333 Knock Sensor 2 Circuit High Input (Bank 2)
P0334 Knock Sensor 2 Circuit Input Intermittent (Bank 2)
P0335 Crankshaft Position Sensor A Circuit Malfunction
P0336 Crankshaft Position Sensor A Circuit Range/Performance
P0337 Crankshaft Position Sensor A Circuit Low Input
P0338 Crankshaft Position Sensor A Circuit High Input
P0339 Crankshaft Position Sensor A Circuit Intermittent
P0340 Camshaft Position Sensor Circuit Malfunction
P0341 Camshaft Position Sensor Circuit Range/Performance
P0342 Camshaft Position Sensor Circuit Low Input
P0343 Camshaft Position Sensor Circuit High Input
P0344 Camshaft Position Sensor Circuit Intermittent
P0350 Ignition Coil Primary/Secondary Circuit Malfunction
P0351 Ignition Coil A Primary/Secondary Circuit Malfunction
P0352 Ignition Coil B Primary/Secondary Circuit Malfunction
P0353 Ignition Coil C Primary/Secondary Circuit Malfunction
P0354 Ignition Coil D Primary/Secondary Circuit Malfunction
P0355 Ignition Coil B Primary/Secondary Circuit Malfunction
P0356 Ignition Coil F Primary/Secondary Circuit Malfunction
P0357 Ignition Coil G Primary/Secondary Circuit Malfunction
P0358 Ignition Coil H Primary/Secondary Circuit Malfunction
P0359 Ignition Coil I Primary/Secondary Circuit Malfunction
P0360 Ignition Coil I Primary/Secondary Circuit Malfunction
P0361 Ignition Coil K Primary/Secondary Circuit Malfunction
P0362 Ignition Coil L Primary/Secondary Circuit Malfunction
P0370 Timing Reference High Resolution Signal A Malfunction
P0371 Timing Reference High Resolution Signal A Too Many Pulses
P0372 Timing Reference High Resolution Signal A Too Few Pulses
P0373 Timing Reference High Resolution Signal A Intermittent/Erratic Pulses
P0374 Timing Reference High Resolution Signal A No Pulses
P0375 Timing Reference High Resolution Signal B Malfunction
P0376 Timing Reference High Resolution Signal B Too Many Pulses
P0377 Timing Reference High Resolution Signal B Too Few Pulses
P0378 Timing Reference High Resolution Signal B Intermittent/Erratic Pulses
P0379 Timing Reference High Resolution Signal B No Pulses
P0380 Glow Plug/Heater Circuit "A" Malfunction
P0381 Glow Plug/Heater Indicator Circuit Malfunction
P0382 Glow Plug/Heater Circuit "B" Malfunction
P0385 Crankshaft Position Sensor B Circuit Malfunction
P0386 Crankshaft Position Sensor B Circuit Range/Performance
P0387 Crankshaft Position Sensor B Circuit Low Input
P0388 Crankshaft Position Sensor B Circuit High Input
P0389 Crankshaft Position Sensor B Circuit Intermittent
P0396 Cylinder 1 Pressure Sensor Circuit Range/Performance
P0397 Cylinder 1 Pressure Sensor Circuit Low
P0398 Cylinder 1 Pressure Sensor Circuit High
P0399 Cylinder 1 Pressure Sensor Circuit Intermittent/Erratic
P03A0 Cylinder 2 Pressure Sensor Circuit Range/Performance
P03A1 Cylinder 2 Pressure Sensor Circuit Low
P03A2 Cylinder 2 Pressure Sensor Circuit High
P03A3 Cylinder 2 Pressure Sensor Circuit Intermittent/Erratic
P03AA Cylinder 3 Pressure Sensor Circuit Range/Performance
P03AB Cylinder 3 Pressure Sensor Circuit Low
P03AC Cylinder 3 Pressure Sensor Circuit High
P03AD Cylinder 3 Pressure Sensor Circuit Intermittent/Erratic
P03B4 Cylinder 4 Pressure Sensor Circuit Range/Performance
P03B5 Cylinder 4 Pressure Sensor Circuit Low
P03B6 Cylinder 4 Pressure Sensor Circuit High
P03B7 Cylinder 4 Pressure Sensor Circuit Intermittent/Erratic
P03BE Cylinder 5 Pressure Sensor Circuit Range/Performance
P03BF Cylinder 5 Pressure Sensor Circuit Low
P03C0 Cylinder 5 Pressure Sensor Circuit High
P03C1 Cylinder 5 Pressure Sensor Circuit Intermittent/Erratic
P03C8 Cylinder 6 Pressure Sensor Circuit Range/Performance
P03C9 Cylinder 6 Pressure Sensor Circuit Low
P03CA Cylinder 6 Pressure Sensor Circuit High
P03CB Cylinder 6 Pressure Sensor Circuit Intermittent/Erratic
P03E9

P04XX Auxiliary Emissions Controls
P0400 Exhaust Gas Recirculation Plow Malfunction
P0401 Exhaust Gas Recirculation Flow Insufficient Detected
P0402 Exhaust Gas Recirculation flow Excessive Detected
P0403 Exhaust Gas Recirculation Circuit Malfunction
P0404 Exhaust Gas Recirculation Circuit Range/Performance
P0405 Exhaust Gas Recirculation Sensor A Circuit Low
P0406 Exhaust Gas Recirculation Sensor A Circuit High
P0407 Exhaust Gas Recirculation Sensor B Circuit Low
P0408 Exhaust Gas Recirculation Sensor B Circuit High
P0409 EGR Sensor "A" Circuit
P040B EGR Temperature Sensor "A" Circuit Range/Performance
P040C EGR Temperature Sensor "A" Circuit Low
P040D EGR Temperature Sensor "A" Circuit High
P040E EGR Temperature Sensor "A" Circuit Intermittent/Erratic
P0410 Secondary Air Injection System Malfunction
P0411 Secondary Air Injection System Incorrect Flow Detected
P0412 Secondary Air Injection System Switching Valve A Circuit Malfunction
P0413 Secondary Air Injection System Switching Valve A Circuit Open
P0414 Secondary Air Injection System Switching Valve A Circuit Shorted
P0415 Secondary Air Injection System Switching Valve B Circuit Malfunction
P0416 Secondary Air Injection System Switching Valve B Circuit Open
P0417 Secondary Air Injection System Switching Valve B Circuit Shorted
P0418 Secondary Air Injection System Relay "A" circuit Malfunction
P0419 Secondary Air Injection System Relay "B Circuit Malfunction
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
P0421 Warm Up Catalyst Efficiency Below Threshold (Bank 1)
P0422 Main Catalyst Efficiency Below Threshold (Bank 1)
P0423 Heated Catalyst Efficiency Below Threshold (Bank l)
P0424 Heated Catalyst Temperature Below Threshold (Bank 1)
P0426 Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1
P0427 Catalyst Temperature Sensor Circuit Low Bank 1 Sensor 1
P0428 Catalyst Temperature Sensor Circuit High Bank 1 Sensor 1
P042A Catalyst Temperature Sensor Circuit Bank 1 Sensor 2
P042B Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2
P042C Catalyst Temperature Sensor Circuit Low Bank 1 Sensor 2
P042D Catalyst Temperature Sensor Circuit High Bank 1 Sensor 2
P042E EGR "A" Control Stuck Open
P042F EGR "A" Control Stuck Closed
P0430 Catalyst System Efficiency Below Threshold (Bank 2)
P0431 Warm Up Catalyst Efficiency Below Threshold (Bank 2)
P0432 Main Catalyst Efficiency Below Threshold (Bank 2)
P0433 Heated Catalyst Efficiency Below Threshold (Bank 2)
P0434 Heated Catalyst Temperature Below Threshold (Bank 2)
P043B Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2
P0440 Evaporative Emission Control System Malfunction
P0441 Evaporative Emission Control System Incorrect Purge flow
P0442 Evaporative Emission Control System leak Detected (small leak)
P0443 Evaporative Emission Control System Purge Control Valve circuit Malfunction
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction
P0447 Evaporative Emission Control System Vent Control Circuit Open
P0448 Evaporative Emission Control System Vent Control Circuit Shorted
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
P0450 Evaporative Emission Control System Pressure Sensor Malfunction
P0451 Evaporative Emission Control System Pressure Sensor Range/Performance
P0452 Evaporative Emission Control System Pressure Sensor Low Input
P0453 Evaporative Emission Control System Pressure Sensor High Input
P0454 Evaporative Emission Control System Pressure Sensor Intermittent
P0455 Evaporative Emission Control System Tank Detected (gross leak)
P0460 Fuel Level Sensor Circuit Malfunction
P0461 Fuel Level Sensor Circuit Range/Performance
P0462 Fuel level Sensor Circuit Low Input
P0463 Fuel level Sensor Circuit High Input
P0464 Fuel level Sensor Circuit Intermittent
P0465 Purge Flow Sensor Circuit Malfunction
P0466 Purge flow Sensor Circuit Range/Performance
P0467 Purge Flow Sensor Circuit Low Input
P0468 Purge flow Sensor Circuit High Input
P0469 Purge flow Sensor Circuit Intermittent
P046A Catalyst Temperature Sensor 1/2 Correlation Bank 1
P0470 Exhaust Pressure Sensor Malfunction
P0471 Exhaust Pressure Sensor Range/Performance
P0472 Exhaust Pressure Sensor Low
P0473 Exhaust Pressure Sensor High
P0474 Exhaust Pressure Sensor Intermittent
P0475 Exhaust Pressure Control Valve Malfunction
P0476 Exhaust Pressure Control Valve Range/Performance
P0477 Exhaust Pressure Control Valve Low
P0478 Exhaust Pressure Control Valve High
P0479 Exhaust Pressure Control Valve Intermittent
P0480 Cooling Fan 1 Control Circuit Malfunction
P0481 Cooling Fan 2 Control Circuit Malfunction
P0482 Cooling Fan 3 Control Circuit Malfunction
P0483 Cooling Fan Rationality Check Malfunction
P0484 Cooling Fan Circuit Over Current
P0485 Cooling Fan Power/Ground Circuit Malfunction
P0487 EGR Throttle Control Circuit "A" /Open
P0488 EGR Throttle Control Circuit "A" Range/Performance
P0489 EGR "A" Control Circuit Low
P0490 Exhaust Gas Recirculation "A" Control Circuit High
P049D EGR "A" Control Position Exceeded Learning Limit

P05XX Vehicle Speed Controls And Idle Control System
P0500 Vehicle Speed Sensor Malfunction
P0501 Vehicle Speed Sensor Range/Performance
P0502 Vehicle Speed Sensor Circuit Low Input
P0503 Vehicle Speed Sensor Intermittent/Erratic/High
P0505 Idle Control System Malfunction
P0506 Idle Control System RPM lower Than Expected
P0507 Idle Control System RPM higher Than Expected
P050E Cold Start Engine Exhaust Temperature Too Low
P0510 Closed Throttle Position Switch Malfunction
P0512 Starter Request Circuit
P0519 Idle Air Control System Performance
P051A Crankcase Pressure Sensor Circuit
P051B Crankcase Pressure Sensor Circuit Range/Performance
P051C Crankcase Pressure Sensor Circuit Low
P051D Crankcase Pressure Sensor Circuit High
P0520 Engine Oil Pressure Sensor/Switch Circuit Malfunction
P0521 Engine Oil Pressure Sensor/Switch Range/Performance
P0522 Engine Oil Pressure Sensor/Switch Low Voltage
P0523 Engine Oil Pressure Sensor/Switch High Voltage
P052E Positive Crankcase Ventilation Regulator Valve Performance
P0530 A/C Refrigerant Pressure Sensor Circuit Malfunction
P0531 A/C Refrigerant Pressure Sensor Circuit Range/Performance
P0532 A/C Refrigerant Pressure Sensor Circuit Low Input
P0533 A/C Refrigerant pressure Sensor Circuit High Input
P0534 Air Conditioner Refrigerant Charge Loss
P053A Positive Crankcase Ventilation Heater Control Circuit /Open
P053B Positive Crankcase Ventilation Heater Control Circuit Low
P053C Positive Crankcase Ventilation Heater Control Circuit High
P0544 Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1
P0545 Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 1
P0546 Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1
P0547 Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1
P0550 Power Steering Pressure Sensor Circuit Malfunction
P0551 Power Steering Pressure Sensor Circuit Range/Performance
P0552 Power Steering Pressure Sensor Circuit Low Input
P0553 Power Steering Pressure Sensor Circuit High Input
P0554 Power Steering Pressure sensor Circuit Intermittent
P0560 System Voltage Malfunction
P0561 System Voltage Unstable
P0562 System Voltage Low
P0563 System Voltage High
P0565 Cruise Control On Signal Malfunction
P0566 Cruise Control Off Signal Malfunction
P0567 Cruise Control Resume Signal Malfunction
P0568 Cruise Control Set Signal Malfunction
P0569 Cruise Control Coast Signal Malfunction
P0570 Cruise Control Accel Signal Malfunction
P0571 Cruise Control/Brake Switch A Circuit Malfunction
P0572 Cruise Control/Brake Switch A Circuit Low
P0573 Cruise Control/Brake Switch A Circuit High
P0574 through 10580 Reserved for Cruise Codes
P0597 Thermostat Heater Control Circuit/Open
P0598 Thermostat Heater Control Circuit Low
P0599 Thermostat Heater Control Circuit High

P06XX Computer Output Circuit
P0600 Serial Communication Link Malfunction
P0601 Internal Control Module Memory Check Sum Error
P0602 Control Module Programming Error
P0603 Internal Control Module Keep Alive Memory (KAM) Error
P0604 Internal Control Module Random Access Memory (RAM) Error
P0605 Internal Control Module Read Only Memory (ROM) Error (Module Identification Defined by SAE J1979)
P0606 PCM Processor Fault
P0607 Control Module Performance
P0608 Control Module VSS Output "A" Malfunction
P0609 Control Module VSS Output "B" Malfunction
P060A Internal Control Module Monitoring Processor Performance
P060B Internal Control Module A/D Processing Performance
P060D Internal Control Module Accelerator Pedal Position Performance
P0610 Control Module Vehicle Options Error
P0611 Fuel Injector Control Module Performance
P0613 TCM Processor
P0615 Starter Relay "A" Circuit
P0616 Starter Relay "A" Circuit Low
P0617 Starter Relay "A" Circuit High
P061B Internal Control Module Torque Calculation Performance
P061C Internal Control Module Engine RPM Performance
P0620 Generator Control Circuit Malfunction
P0621 Generator Lamp "L" Control Circuit Malfunction
P0622 Generator Field "F" Control Circuit Malfunction
P0627 Fuel Pump "A" Control Circuit/Open
P0628 Fuel Pump "A" Control Circuit Low
P0629 Fuel Pump "A" Control Circuit High
P062A Fuel Pump "A" Control Circuit Range/Performance
P062B Internal Control Module Fuel Injector Control Performance
P062C Internal Control Module Vehicle Speed Performance
P062F Internal Control Module EEPROM Error
P0633 Immobilizer Key Not Programmed - ECM/PCM
P0638 Throttle Actuator Control Range/Performance Bank 1
P0642 Sensor Reference Voltage "A" Circuit Low
P0643 Sensor Reference Voltage "A" Circuit High
P064C Glow Plug Control Module 1
P064F Unauthorized Software/Calibration Detected
P0650 Malfunction Indicator Lamp (MIL) Control Circuit Malfunction
P0653 Sensor Reference Voltage "B" Circuit High
P0654 Engine RPM Output Circuit Malfunction
P0655 Engine Hot Lamp Output Control Circuit Malfunction
P0656 Fuel Level Output Circuit Malfunction
P065A Generator System Performance
P0667 Control Module Internal Temperature Sensor "A" Range/Performance
P0668 Control Module Internal Temperature Sensor "A" Circuit Low
P0669 Control Module Internal Temperature Sensor "A" Circuit High
P066A Cylinder 1 Glow Plug Control Circuit Low
P066C Cylinder 2 Glow Plug Control Circuit Low
P066E Cylinder 3 Glow Plug Control Circuit Low
P0670 Glow Plug Control Module 1 Control Circuit/Open
P0671 Cylinder 1 Glow Plug Circuit/Open
P0672 Cylinder 2 Glow Plug Circuit/Open
P0673 Cylinder 3 Glow Plug Circuit/Open
P0674 Cylinder 4 Glow Plug Circuit/Open
P0675 Cylinder 5 Glow Plug Circuit/Open
P0676 Cylinder 6 Glow Plug Circuit/Open
P0677 Cylinder 7 Glow Plug Circuit/Open
P0678 Cylinder 8 Glow Plug Circuit/Open
P067A Cylinder 4 Glow Plug Control Circuit Low
P067C Cylinder 5 Glow Plug Control Circuit Low
P067E Cylinder 6 Glow Plug Control Circuit Low
P068A ECM/PCM Power Relay De-Energized Performance - Too Early
P068B ECM/PCM Power Relay De-Energized Performance - Too Late
P068C Cylinder 7 Glow Plug Control Circuit Low
P068E Cylinder 8 Glow Plug Control Circuit Low
P0691 Fan 1 Control Circuit Low
P0692 Fan 1 Control Circuit High
P0699 Sensor Reference Voltage "C" Circuit High
P06A0 Variable A/C Compressor Control Circuit
P06A1 Variable A/C Compressor Control Circuit Low
P06A2 Variable A/C Compressor Control Circuit High
P06B1 Sensor Power Supply "A" Circuit Low
P06B2 Sensor Power Supply "A" Circuit High
P06B4 Sensor Power Supply "B" Circuit Low
P06B5 Sensor Power Supply "B" Circuit High
P06B9 Cylinder 1 Glow Plug Circuit Range/Performance
P06BA Cylinder 2 Glow Plug Circuit Range/Performance
P06BB Cylinder 3 Glow Plug Circuit Range/Performance
P06BC Cylinder 4 Glow Plug Circuit Range/Performance
P06BD Cylinder 5 Glow Plug Circuit Range/Performance
P06BE Cylinder 6 Glow Plug Circuit Range/Performance
P06BF Cylinder 7 Glow Plug Circuit Range/Performance
P06C0 Cylinder 8 Glow Plug Circuit Range/Performance
P06D8 Sensor Reference Voltage "F" Circuit High
P06DA Engine Oil Pressure Control Circuit/Open
P06DB Engine Oil Pressure Control Circuit Low
P06DC Engine Oil Pressure Control Circuit High

P07XX Transmission
P0700 Transmission Control System Malfunction
P0701 Transmission Control System Range/Performance
P0702 Transmission Control System Electrical
P0703 Torque Converter/Brake Switch B Circuit Malfunction
P0704 Clutch Switch Input Circuit Malfunction
P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input)
P0706 Transmission Range Sensor Circuit Range/Performance
P0707 Transmission Range Sensor Circuit Low Input
P0708 Transmission Range Sensor Circuit High Input
P0709 Transmission Range Sensor Circuit Intermittent
P0710 Transmission Fluid Temperature Sensor Circuit Malfunction
P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance
P0712 Transmission Fluid Temperature Sensor Circuit Low Input
P0713 Transmission Fluid Temperature Sensor Circuit High Input
P0714 Transmission Fluid Temperature Sensor Circuit Intermittent
P0715 Input/Turbine Speed Sensor Circuit Malfunction
P0716 Input/Turbine Speed Sensor Circuit Range/Performance
P0717 Input/Turbine Speed Sensor Circuit No Signal
P0718 Input/Turbine Speed Sensor Circuit Intermittent
P0719 Torque Converter/Brake Switch B Circuit Low
P0720 Output Speed Sensor Circuit Malfunction
P0721 Output Speed Sensor Circuit Range/Performance
P0722 Output Speed Sensor Circuit No Signal
P0723 Output Speed Sensor Circuit Intermittent
P0724 Torque Converter/Brake Switch B Circuit High
P0725 Engine Speed Input Circuit Malfunction
P0726 Engine Speed Input Circuit Range/Performance
P0727 Engine Speed Input Circuit No Signal
P0728 Engine Speed Input Circuit Intermittent
P0730 Incorrect Gear Ratio
P0731 Gear 1 Incorrect Ratio
P0732 Gear 2 Incorrect Ratio
P0733 Gear 3 Incorrect Ratio
P0734 Gear 4 Incorrect Ratio
P0735 Gear 5 Incorrect Ratio
P0736 Reverse Incorrect Ratio
P0740 Torque Converter Clutch Circuit Malfunction
P0741 Torque Converter Clutch Circuit Performance or Stuck Off
P0742 Torque Converter Clutch Circuit Stuck On
P0743 Torque Converter Clutch Circuit Electrical
P0744 Torque Converter Clutch Circuit Intermittent
P0745 Pressure Control Solenoid Malfunction
P0746 Pressure Control Solenoid Performance or Stuck Off
P0747 Pressure Control Solenoid Stuck On
P0748 Pressure Control Solenoid Electrical
P0749 Pressure Control Solenoid Intermittent
P0750 Shift Solenoid A Malfunction
P0751 Shift Solenoid A Performance or Stuck Off
P0752 Shift Solenoid A Stuck On
P0753 Shift Solenoid A Electrical
P0754 Shift Solenoid A Intermittent
P0755 Shift Solenoid B Malfunction
P0756 Shift Solenoid B Performance or Stuck Off
P0757 Shift Solenoid B Stuck On
P0758 Shift Solenoid B Electrical
P0759 Shift Solenoid B Intermittent
P0760 Shift Solenoid C Malfunction
P0761 Shift Solenoid C Performance or Stuck Off
P0762 Shift Solenoid C Stuck On
P0763 Shift Solenoid C Electrical
P0764 Shift Solenoid C Intermittent
P0765 Shift Solenoid D Malfunction
P0766 Shift Solenoid D Performance or Stuck Off
P0767 Shift Solenoid D Stuck On
P0768 Shift Solenoid D Electrical
P0769 Shift Solenoid D Intermittent
P0770 Shift Solenoid E Malfunction
P0771 Shift Solenoid E Performance or Stuck Off
P0772 Shift Solenoid E Stuck On
P0773 Shift Solenoid E Electrical
P0774 Shift Solenoid E Intermittent
P0778 Pressure Control Solenoid "B" Electrical
P0780 Shift Malfunction
P0781 1-2 Shift Malfunction
P0782 2-3 Shift Malfunction
P0783 3-4 Shift Malfunction
P0784 4-5 Shift Malfunction
P0785 Shift/Timing Solenoid Malfunction
P0786 Shift/Timing Solenoid Range/Performance
P0787 Shift/Timing Solenoid low
P0788 Shift/Timing Solenoid High
P0789 Shift/Timing Solenoid Intermittent
P0790 Normal/Performance Switch Circuit Malfunction
P0792 Intermediate Shaft Speed Sensor "A" Circuit Range/Performance
P0794 Intermediate Shaft Speed Sensor "A" Circuit Intermittent
P0798 Pressure Control Solenoid "C" Electrical

P08XX Transmission
P0801 Reverse Inhibit Control Circuit Malfunction
P0803 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction
P0804 1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction
P0806 Clutch Position Sensor "A" Circuit Range/Performance

The 12 steps system monitoring requirements are

  • Catalyst
  • Heated Catalyst
  • Misfire and Misfire for Diesels
  • Evaporative System
  • Secondary Air System
  • Air Conditioning System Refrigerant
  • Fuel System
  • Oxygen System
  • Exhaust Gas Recirculation (EGR) System
  • Positive Crankcase Ventilation (PCV) System
  • Thermostat
  • Comprehensive Component

Mercedes-Benz SDS-tool is used for diagnosis.
Generic Tools may not have same functionality.

SAE Requirements J1979:

  • Mode #1 - Current powertrain diagnostic data including: engine parameters, MIL status and readiness codes
  • Mode #2 - Powertrain freeze frame data
  • Mode #3 - Emission-related powertrain diagnostic trouble codes (DTCs)
  • Mode #4 - Clear/Reset emission-related diagnostic information including MIL status, DTCs, freeze frame and readiness codes
  • Mode #5 - Oxygen sensor monitor test results
  • Mode #6 - On-board monitoring test results for non-continuous monitor systems (i.e., catalyst, exhaust gas re-circulation (EGR), evaporative system, etc.)
  • Mode #7 - On-board monitoring test results for continuous monitor systems (i.e., fuel trim, misfire, comprehensive components)

OBD - Connector, J1962:


Pin Description
1 Manufacturer specific
2 J1850 bus+
3 Manufacturer specific
4 Chassis ground
5 Electronic ground
6 CAN high (J-2284)
7 ISO 9141-2 K output
8 Manufacturer specific
9 Manufacturer specific
10 J1850 bus
11 Manufacturer specific
12 Manufacturer specific
13 Manufacturer specific
14 CAN low (J-2284)
15 ISO 9141-2 L output
16 Battery voltage
A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z 

A
A/C air conditioning
A/C P A/C Pressure Cut-out Switch
A/D Analog to Digital Converter
A/D Auto Drive
A/F air/fuel ratio
A/T automatic transmission
AAC Automatic Air Conditioning
AAC Auxiliary Air Control
AAT Ambient Air Temperature
AAV Auxiliary Air Valve
AB Air-Bag
ABC Active Body Control
ABS antilock brake system
ABV Air Bypass Valve
AC alternating current
ACC Adaptive Cruise Control
ACC Air Conditioning Clutch
ACC Activated Carbon Container
ACL Air Cleaner
ACP Air Conditioning Pressure
ACT Air Charge Temperature
ACV Air Control Valve
AFM air flow meter
AFR Air/Fuel Ratio
AIC Automatic Idle Control
AIS automatic idle speed motor
AIS Air Injection System
ALS Anti Lock System
AP Accelerator Pedal
APP Sensor Accelerator Pedal Position Sensor
ARS Anti-Roll Stabilisation
ASC Anti Slip Control
ASMS Automatic Stability Management System
ASR Acceleration Slip Regulation
AT Automatic Transmission
ATC Automatic Transmission Control
ATC after top center
ATCS Active Torque Control System
ATDC after top dead center
ATF automatic transmission fluid
ATI Advanced Turbo Intercooling

B
B+ Battery Positive Voltage
BAT battery
Bd Baud
BDC Bottom Dead Center
BOB Breakout Box
BOO Brake On/Off Switch
BP Barometric Pressur Sensor
BPA Bypass Air Solenoid
BPP Brake Pedal Position Sensor
BPT back-pressure transducer
BTC before top center
BTDC before top dead center
BTS Battery Temperature Sensor

C
C Celsius (degrees)
CAC Charge Air Cooler
CAFE Corporate Average Fuel Economy
CALPAK calibration pack
CAN Controller Area Network
CARB California Air Resource Board
CARB Carburator
CAS crank angle sensor
CAT Catalysator
CC catalytic converter
CC Cruise Control
CC cubic centimeter
CCEI Coolant Controlled Idle Enrichment (Chrysler)
CCM Cluster Control Modul
CCOT clutch cycling orifice tube
CCP Charcoal Canister Purge
CCS Cruise Control System
CCV canister control valve
CDI Comon Rail Direct Injection
CEAB cold engine air bleed
CEL Check Engine Light
CESS cold engine sensor switch
CFC Chlorofluorocarbons
CFM cubic feet per minute
CHT Cylinder Head Temperature
CID cubic inch displacement
CIH Camshaft In Head
CO carbon monoxide
CO2 carbon dioxide
COC Conventional Oxidation Catalyst
COP Coil On Plug Ignition
CPU central processing unit
CR Common Rail
CTVS choke thermal vacuum switch

D
DC direct current
DFC Damped Flywheel Clutch
DFS deceleration fuel shutoff (Ford)
DI Direct Injection
DM Diagnose-Modul
DOHC dual overhead cams
DOT Department of Transportation
DRCV distributor retard control valve
DTR Distronik
DV Delay Valve
DVDSV differential vacuum delay and separator valve
DVDV distributor vacuum delay valve
DVOM digital volt ohm meter

E
EAG Elektron. Steuerung Getriebe
EATC electronic automatic temperature control
ECA electronic control assembly
EDC Electronic Diesel Control
EDS Elektron. Diesel-System
EEGR Electronic EGR Valve
EEPROM electronically erasable programmable read only memory chip
EFC electronic fuel control
EGR exhaust gas recirculation
EGR S/O EGR Shut Off
EGRV EGR Vent vacuum solenoid Valve
EGS Elektron. Getriebe-Steuerung
EMI electromagnetic interference
EOBD European On Board Diagnostic
EOS exhaust oxygen sensor
EPA Enviromental Protection Agency
EPC Electronic Pressure Control
EPROM erasable programmable read only memory chip
ERS Engine Rpm Sensor
ESO Engine Shut Off
ESP Elektron. Stabilitätsprogramm, Fahrdynamikregelung
ETC Electronic Traction Control
ETS Elektron. Traction System
EV Elektro Vehicle
EVAP evaporative emissions
EVE Elektron. Verteilereinspritzsystem

F
F Fahrenheit (degrees)
FEEPROM Flash Electrically Erasable Programmable Read Only Memory
FI fuel injection
FMEM Failure Mode Effects Management
FMVSS Federal Motor Vehicle Safety Standards
FSS Flexible Service System
ft.lb. foot pound
FTP Federal Test Procedure
FTS Fuelpump Temperature Sensor
FWD front wheel drive

G
GND ground
GPM grams per mile
GRND ground

H
HC hydrocarbons
HCU Hydraulic Control Unit
HEGO heated exhaust gas oxygen sensor
HFM Benzin-Einspritz- und Zündsystem
Hg mercury
HLOS Hardware Limited Operation Strategy
HO2S Heated Oxygen Sensor
hp horsepower

I
I/P instrument panel
IAT inlet air solenoid valve
IC ignition control
IC integrated circuit
ICP Injector Control Pressure
ID inside diameter
IDM ignition diagnostic monitor
IGN ignition
IM240 inspection/maintenance 240 program
INJ injector
IPR injection pressure regulator
ISO International Standards Organization
ISS Intermediate Speed Sensor
ITS Inflatable Tubular Structure

J
- -

K
KAM Keep Alive Memory
kHz kilohertz
kPa kilopascal
Km kilometers
KOEO Key On Engine Off Self-Test
KOER Key On Engine Running Self-Test
KPH kilometers per hour
KS knock sensor
KV kilovolts
KWP Key Word Protocol

L
L liters
lb.ft. pound feet
LCD liquid crystal display
LED light emitting diode
LH Benzin-Einspritzanlage LH Motor
LIN Local Interconnect Network
LSD limited slip differential

M
MAF mass airflow sensor
MAP manifold absolute pressure
MAT manifold air temperature
ME Motor-Elektronik
MFG Manufacturer
MFI multiport fuel injection
MIL malfunction indicator lamp
mm millimeters
MPFI multi point fuel injection
MPG miles per gallon
MPH miles per hour
MPI multi point injection
ms millisecond
MSDS material safety data sheet
MT Manual Transmission
MTF Manual Transmission Fluid
mV millivolts

N
NDIS Nissan Direct Injection System
NDS Neutral Drive Switch
Nm Newton meters
NOS New Old/Original Stock
NOX nitrogen oxides
NTC Negative Temperature Coefficient

O
O2 oxygen sensor
OASIS Online Automobile Service Information System
OBD on-board diagnostics
OBD2 on-board diagnostics (second generation)
OCIL Overdrive Cancel Indicator Light
OCS Overdrive Cancel Switch
OCT ADJ Octane Adjust device
OD outside diameter
OD overdrive
OE original equipment
OEM original equipment manufacture
OHC overhead cam
OS oxygen sensor

P
P/B power brakes
P/N part number
PCM powertrain control module (supercedes ECM)
PCR Piezo Common Rail
PCV positive crankcase ventilation
PECV power enrichment control valve
PPM parts per million
PROM program read only memory computer chip
PS power steering
PSI pounds per square inch
PSPS power steering pressure switch
PTC Positive Temperature Coefficient
PTS Park Tronic System
PVA ported vacuum advance
PVS ported vacuum switch

Q
- -

R
RFI radio frequency interference
RPM revolutions per minute
RWD rear-wheel drive

S
SAE Society of Automotive Engineers
SAVM spark advance vacuum modulator
SBC Sensotronic Brake Control
SDI Saab Direct Ignition
SIR Supplemental Inflatable Restraint (air bag)
SMPI Sequential Multiport Fuel Injection (Chrysler)
SO2 sulfur dioxide
SOHC single overhead cam
SRDV spark retard delay valve
SRS Supplemental Restraint System (air bag)

T
TACH tachometer
TAV temperature actuated vacuum
TBI throttle body injection
TCM Transmission Control Modul
TDC top dead center
TOT Transmission Oil Temperature sensor
TPP throttle position potentiometer
TPS throttle position sensor
TSB Technical Service Bulletin
TV throttle valve
TWC three-way catalyst

U
- -

V
V volts
VAC volts alternating current
VAF vane air flow sensor
VAPS II Variable Assist Power Steering II
VDC volts direct current
VDV vacuum delay valve
VICS Vehicle Information and Communication System
VIN vehicle identification number
VOM Volt-Ohm Meter
VREF Reference Voltage
VRS Variable Reluctance Sensor
VSS vehicle speed sensor
VVA Venturi Vacuum Amplifier

W
WAC Wide-open throttle A/C Cutoff
WOT wide open throttle
WSS wheel speed sensor

X
- -

Y
- -

Z
- -