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OBDII/EOBD diagnostics trouble codes definition

If your car supports OBD II or EOBD, then you can already use almost 5000 generic OBDII codes. These codes are from PowerTrain series (P0XXX, P2XXX, P34XX), Body Series (B0XXX), Chassis series (C0XXX), Network series (U0XXX, U2XXX, U3XXX).

Also there is a list of more than 13500 additional manufacturer specific codes.

Supported manufacturers with specific OBD2 codes:


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Definition of check engine code P1121:

Acura:

Throttle Position Lower Than Expected

BMW:

Pedal Position Sensor 1 Range/Performance Problem

Citroen/Peugeot:

Throttle Position (TP) Sensor Circuit Intermittent High Voltage

Daewoo:

THROTTLE POS INPUT SIG FAULT

Fiat:

Throttle position potentiometer 1 [signal implausible]

Ford:

Throttle Position (TP) Sensor Circuit Intermittent High Voltage

GM:

Throttle Position (TP) Sensor Circuit Intermittent High Voltage

Honda:

Throttle Position (TP) Sensor Lower Than Expected

Isuzu:

TP Sensor Circuit Intermittent Voltage High

Jaguar:

Pedal Position Sensor A Circuit Range/Performance

Kia:

Pedal Position Sensor A Circuit Range / Performance

Lexus:

Accelerator Pedal Position Sensor Range/Performance Problem

Lincoln:

Throttle Position Sensor Inconsistent with Mass Air Flow Sensor

Mazda:

Throttle Position Sensor Signal Not Consistent with Mass Airflow Signal

Mercedes:

Tp sensor signal not consistent with MAF signal

Mercury:

Throttle Position Sensor Inconsistent with Mass Air Flow Sensor

Nissan:

Electronic Throttle Control Actuator

Oldsmobile:

Throttle Position Sensor Inconsistent with Mass Air Flow Sensor

Porsche:

Oxygen Sensor Heating

Saturn:

Throttle Position Sensor Circuit Voltage Out Of Range, High

Scion:

Accelerator Pedal Position Sensor Range/Performance Problem.

Toyota:

Accelerator Pedal Position Sensor Range / Performance Problem

Volkswagen/Audi:

O2 Sensor Heater Circ.,Bank2 - Sensor2 Short to Ground

Volvo:

O2 Sensor Heater Circ.,Bank2 - Sensor2 Short to Ground

Subaru:

Neutral Position Switch Circuit Low Input AT Vehicles

Subaru:

Neutral Position Switch Circuit High Input MT Vehicles