P0101
Mass or Volume Air Flow A Circuit Range/Performance.
The computer sees an air measurement that doesn't match what's expected. The code doesn't confirm the sensor is damaged.
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OBD codes
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P0121
Throttle/pedal position sensor/switch A circuit range/performance.
The computer compared the accelerator or pedal position with what was expected and found a difference. The code does not confirm which sensor, connection or mechanism produced it.
P0122
Throttle/pedal position sensor/switch A circuit low input.
The electrical throttle-or-pedal position signal remained below the range expected by the computer.
P0123
Throttle/pedal position sensor/switch A circuit high input.
The electrical throttle-or-pedal position signal remained above the range expected by the computer.
P0128
Coolant thermostat temperature below the control range.
The engine did not reach the expected temperature under the controlled conditions. The cooling, measurement and conditions of use are still to be separated.
P0130
Oxygen sensor circuit fault, bank 1, sensor 1.
The computer detected that the circuit for the oxygen sensor ahead of the catalytic converter on bank 1 did not perform as expected.
P0132
Oxygen sensor circuit high voltage, bank 1, sensor 1.
The signal from the first oxygen sensor on bank 1 remained above the expected range. That alone does not prove the sensor is defective.
P0133
Oxygen sensor circuit slow response, bank 1, sensor 1.
The signal from the first oxygen sensor on bank 1 changed more slowly than expected during the vehicle test.
P0134
Oxygen sensor circuit no activity detected, bank 1, sensor 1.
The computer did not observe the expected activity from the first oxygen sensor on bank 1 under the test conditions.
P0135
Oxygen sensor heater circuit fault, bank 1, sensor 1.
The circuit that heats the first oxygen sensor on bank 1 did not perform as expected.
P0136
Oxygen sensor circuit fault, bank 1, sensor 2.
The computer detected unexpected electrical behavior from the downstream oxygen sensor on bank 1.
P0137
Oxygen sensor circuit low voltage, bank 1, sensor 2.
The downstream oxygen-sensor signal on bank 1 remained below the expected range during the test.
P0138
Oxygen sensor circuit high voltage, bank 1, sensor 2.
The downstream oxygen-sensor signal on bank 1 remained above the expected range during the test.
P0139
Oxygen sensor circuit slow response, bank 1, sensor 2.
The downstream oxygen sensor on bank 1 responded more slowly than the computer expected.
P013A
Oxygen sensor slow response, rich to lean, bank 1, sensor 2.
The downstream oxygen sensor on bank 1 took longer than expected to reflect a change from a rich mixture to a lean mixture.
P0140
Oxygen sensor circuit no activity detected, bank 1, sensor 2.
The computer did not observe the expected activity from the downstream oxygen sensor on bank 1 under the test conditions.
P0141
Oxygen sensor heater circuit fault, bank 1, sensor 2.
The circuit that heats the downstream oxygen sensor on bank 1 did not perform as the computer expected.
P016A
Excessive time to enter closed-loop air-fuel ratio control.
The computer took more than expected to start tuning the mix using sensor feedback.
P0171
System too lean, bank 1.
The computer had to correct a mixture with more air or less fuel than expected at Bank 1.
P0172
System too rich, bank 1.
The computer detected a mixture with more fuel or less air than expected at Bank 1.
P0181
Fuel temperature sensor A circuit range/performance.
The reported fuel temperature did not coincide with the intended conduct as compared with other measurements.
P0182
Fuel temperature sensor A circuit low input.
The fuel-temperature sensor signal remained below the expected electrical range.
P0183
Fuel temperature sensor A circuit high input.
The fuel temperature sensor signal was above the expected electrical range.
P0191
Fuel rail pressure sensor circuit range/performance.
Reported fuel-rail pressure did not match the range or response expected by the computer.
P0201
Injector circuit/open, cylinder 1.
The computer detected an electrical problem in the control circuit for injector 1. The code does not prove that the injector itself is faulty.
P0202
Injector circuit/open, cylinder 2.
The computer detected an electrical problem in the control circuit for injector 2. The code does not prove that the injector itself is faulty.
P0203
Injector circuit/open, cylinder 3.
The computer detected an electrical problem in the control circuit for injector 3. The code does not prove that the injector itself is faulty.
P0204
Injector circuit/open, cylinder 4.
The computer detected an electrical problem in the control circuit for injector 4. The code does not prove that the injector itself is faulty.
P0300
Random or multiple-cylinder misfire detected.
The computer noticed irregular power inputs without limiting the condition to a single cylinder.
P0301
Cylinder 1 misfire detected.
The computer detected that cylinder 1 was not contributing power consistently. It still does not know what caused that condition.
P0302
Cylinder 2 misfire detected.
The computer detected that cylinder 2 was not contributing power consistently. It still does not know what caused that condition.
P0303
Combustion failure detected in cylinder 3.
The computer detected that cylinder 3 was not contributing power consistently. The code does not identify which component caused the condition.
P0304
Cylinder 4 misfire detected.
The computer detected that cylinder 4 was not contributing power consistently. It still does not know what caused that condition.
P0324
Knock control system error.
The computer detected that the system monitoring or controlling the detonation did not behave as expected.
P0327
Knock sensor 1 circuit low input, bank 1.
The signal from the first detonation sensor on Bank 1 fell below the range the computer expected.
P0335
Crankshaft position sensor A circuit fault.
The computer lost or rejected the signal it uses to determine crankshaft position and speed.
P0336
Crankshaft position sensor A circuit range/performance.
The crankshaft signal did not match the pattern or timing expected by the computer.
P0340
Camshaft position sensor A circuit fault, bank 1 or single sensor.
The computer did not receive the expected signal to know the position of the levas tree. It doesn't confirm the sensor is the cause.
P0341
Camshaft position sensor A circuit range/performance, bank 1 or single sensor.
The camshaft pattern did not match what the computer expected for bank 1 or the single sensor.
P0342
Camshaft position sensor A circuit low input, bank 1 or single sensor.
The signal from camshaft position sensor A remained low while the computer monitored the crankshaft reference.
P0351
Ignition coil A primary/secondary circuit fault.
The computer detected an electrical problem at the circuit that controls or monitors the coil identified as A. It doesn't confirm that the coil's damaged.
P0401
Exhaust gas recirculation flow insufficient detected.
The computer expected more flow from the EGR system than it could verify.
P0420
Catalyst system efficiency below threshold, bank 1.
The computer calculated that the bank 1 catalyst system was performing below the expected threshold. This code alone does not justify replacing the catalytic converter.
P0430
Catalyst system efficiency below threshold, bank 2.
The computer calculated that the bank 2 catalyst system was performing below the expected threshold. This code alone does not justify replacing the catalytic converter.
P0441
Evaporative emission system incorrect purge flow.
The computer detected that the movement of fuel vapours did not match what was expected during the purge.
P0442
Evaporative emission system small leak detected.
The system detected a small seal loss in the fuel vapour-containing circuit.
P0455
Evaporative emission system gross leak or no flow detected.
The system failed to maintain the expected sealing or flow to control fuel vapour.
P0456
Evaporative emission system very small leak detected.
The computer detected a very small seal loss in the fuel vapour system.
P0506
Idle control system RPM lower than expected.
The engine revolutions at the slowdown were below the computer's target.
P0507
Idle control system RPM higher than expected.
The engine's downturns were above the computer's target.