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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 P1734:

BMW:

Pressure Control Solenoid "B" Electrical

Chrysler/Dodge/Jeep:

2C Pressure Switch Check

Citroen/Peugeot:

Gear Control Malfunction

Daewoo:

SPEED SNSR STD VOLT LOW INPUT

Ford:

Gear Control Malfunction

Honda:

Problem in Shift Control System: Shift Solenoid Valves B and C Stuck ON,or Shift Valves B and C Stuck

Jaguar:

Gear Control Malfunction

Kia:

Gear Control Malfuntion

GM:

Retarder Temperature Sensor High