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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 P1423:

BMW:

Secondary Air System Bank 1

Citroen/Peugeot:

EGI Functionality Test Failed

Ford:

EGI Functionality Test Failed

GM:

Intake Air High Pressure Switch Circuit High Voltage

Volkswagen/Audi:

Sec. Air Inj. Sys.,Bank1 Flow too Low

Volvo:

Sec. Air Inj. Sys.,Bank1 Flow too Low

Subaru:

EVAP Vent Control High Input