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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 P1856:

Citroen/Peugeot:

Transmission Transfer Case Contact Plate "C" Short Circuit To Battery

Ford:

Transmission Transfer Case Contact Plate 'C' Short Circuit To Battery

Volkswagen/Audi:

Throttle / Pedal Pos. Sensor A Circ. Error Message from Engine Contr.

Volvo:

Throttle / Pedal Pos. Sensor A Circ. Error Message from Engine Contr.