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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 P1646:

Chrysler/Dodge/Jeep:

Hydraulic Cooling Fan Control Circuit Low

GM:

Evaporative Emission (EVAP) Vent Solenoid Control Circuit

Honda:

MOTSTB Signal Malfunction

Jaguar:

Linear O2 Sensor Control Chip (Bank 1)

Kia:

Linear 02 Sensor Control Chip (Bank 1)

Volkswagen/Audi:

Please Check DTC Memory of all wheel drive ECU

Volvo:

Please Check DTC Memory of all wheel drive ECU

Ford:

LINEAR O2 SENSOR CONTROL CHIP (Bank 1)