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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 P1506:

BMW:

Idle-Speed Control Valve Opening Solenoid Control Circuit Signal High

Citroen/Peugeot:

Idle Air Control Overspeed Error

Daewoo:

MPS

Ford:

Idle Air Control Overspeed Error

Jaguar:

Idle Air Control System RPM Lower Than Expected - B Bank

Lincoln:

Idle Air Control Over Speed Error

Mazda:

Idle Air Control System Overspeed Detected

Mercedes:

IAC system overspeed detected during self test

Mercury:

Idle Air Control Over Speed Error

Oldsmobile:

Idle Air Control Over Speed Error

Volkswagen/Audi:

Closed Throttle Pos. Switch Does Not Open / Short to Ground

Volvo:

Closed Throttle Pos. Switch Does Not Open / Short to Ground

GM:

Starter Relay Circuit Low