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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 P1504:

BMW:

Idle-Speed Control Valve Closing Solenoid Control Open Circuit

Citroen/Peugeot:

Idle Air Control Circuit Malfunction

Daewoo:

V CLE SPD SNR FLT( CAN COMMERR)

Fiat:

Input key

Ford:

Idle Air Control Circuit Malfunction

GM:

Theft Deterrent Fuel Enable Signal Not Correct

Lincoln:

Intake Air Control Circuit malfunction

Mazda:

Idle Air Control Solenoid Circuit Intermittent

Mercedes:

Idle air control solenoid circuit intermittent fault

Mercury:

Intake Air Control Circuit malfunction

Oldsmobile:

Intake Air Control Circuit malfunction

Volkswagen/Audi:

Intake Air Sys. Bypass Leak Detected

Volvo:

Intake Air Sys. Bypass Leak Detected