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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 P1844:

Citroen/Peugeot:

Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Battery

Ford:

Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Battery

GM:

Torque Reduction Signal Circuit Desired By TCM

Opel:

Engine control module (ECM),torque control - signal out of range

Volkswagen/Audi:

Please check DTC Memory of central electric control ECU

Volvo:

Please check DTC Memory of central electric control ECU

Subaru:

TRANSMISSION FLUID PRESSURE SENSOR/SWITCH E CIRCUIT