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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 P1781:

Chrysler/Dodge/Jeep

Pressure switch circuit: OD

Citroen/Peugeot

4X4 Switch Out of Self Test Range

Daewoo

ACTUATOR MAL

Ford

4X4 Switch Out of Self Test Range

GM

Engine Torque Signal Circuit

Lincoln

4x4 Low Switch is Out of Self-Test Range

Mazda

Transmission 4x4 Low Switch out of Range Fault

Mercedes

Upshift delay switchover valve (AT/CC) (Y3/5)

Mercury

4x4 Low Switch is Out of Self-Test Range

Oldsmobile

4x4 Low Switch is Out of Self-Test Range

Opel

CAN data bus,ECM actual torque signal - malfunction detected

Volkswagen/Audi

Engine Torque Reduction Open / Short to Ground

Volvo

Engine Torque Reduction Open / Short to Ground
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