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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 P1784:

Chrysler/Dodge/Jeep:

Pressure switch circuit: LR

Citroen/Peugeot:

Transmission Mechanical Failure - First And Reverse

Ford:

Transmission Mechanical Failure - First And Reverse

Lincoln:

Transmission Mechanical Failure - First And Reverse

Mercury:

Transmission Mechanical Failure - First And Reverse

Oldsmobile:

Transmission Mechanical Failure - First And Reverse

Volkswagen/Audi:

Shift up / down Wire Open / Short to Ground

Volvo:

Shift up / down Wire Open / Short to Ground