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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:

Enter code:
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P
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Definition of check engine code P2501:

Generic (Common for all car manufacturers):

Generator Lamp/L-Terminal Circuit High

GM:

Generator L-Terminal Circuit High Voltage