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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 P1791:

Acura:

A/T Concerns

Chrysler/Dodge/Jeep:

ECT Level Input Circuit

Citroen/Peugeot:

TP (Electric) Circuit Malfunction

Daewoo:

THROTTLE OPEN DUTY FAULT

Ford:

TP (Electric) Circuit Malfunction

GM:

Transmission Control Module Loop

Honda:

Vehicle Speed Sensor (VSS) Range / Performance Problem

Jaguar:

Ignition Supply Malfunction

Kia:

Ignition Supply Malfunction

Mercedes:

TP (Electric) Circuit

Mitsubishi:

PCM ECT level signal to TCM circuit fault

Volkswagen/Audi:

Transmission Range Display Circ. Short to Ground

Volvo:

Transmission Range Display Circ. Short to Ground