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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 P1786:

Chrysler/Dodge/Jeep:

Pressure switch circuit: LR/2-4

Citroen/Peugeot:

3-2 Downshift Error

Daewoo:

ENGINE RPM OUTPUT CIRCUIT

Ford:

3-2 Downshift Error

Lincoln:

3-2 Downshift Error

Mercury:

3-2 Downshift Error

Oldsmobile:

3-2 Downshift Error

Volkswagen/Audi:

Reversing Light Circ. Open

Volvo:

Reversing Light Circ. Open

GM:

Shift Lock Solenoid Circuit - High Voltage