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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 P1684:

Chrysler/Dodge/Jeep:

The battery has been disconnected within the last 50 starts

Citroen/Peugeot:

Metering Oil Pump Position Sensor Circuit Malfunction

Fiat:

Motorised throttle(plausibility)

Ford:

Metering Oil Pump Position Sensor Circuit Malfunction

GM:

Driver 5 Line 4

Honda:

Throttle Valve Return Spring Performance Problem

Mercedes:

Metering Oil Pump Position Sensor Circuit

Mini:

Electronic throttle control monitor level 2/3 - clutch torque min error

Plymouth:

Battery Disconnected Within Last 50 Starts

Volkswagen/Audi:

Contr. Unit Programming Communication Error

Volvo:

Contr. Unit Programming Communication Error