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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 P1634:

BMW:

Throttle Valve Adaptation; Spring Test Failed

Chrysler/Dodge/Jeep:

TCM Internal - Internal Watchdog Performance

Citroen/Peugeot:

Data Output Link Circuit Failure

Daewoo:

CRUISE LAMP FAULT

Ford:

Data Output Link Circuit Failure

GM:

Ignition 1 Switch Circuit

Jaguar:

Throttle watchdog circuit failure

Lincoln:

Data Output Link Circuit Failure

Mazda:

Generator Terminal 'B' Circuit Open

Mercedes:

Generator Control System - no charge

Mercury:

Data Output Link Circuit Failure

Oldsmobile:

Data Output Link Circuit Failure

Volkswagen/Audi:

Accelera. Pedal Pos. Sensor 2 Signal too High

Volvo:

Accelera. Pedal Pos. Sensor 2 Signal too High