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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 P1656:

Chrysler/Dodge/Jeep:

J1850 Communication Bus Busy / Not Available

Geo:

Intake CMP Actuator Solenoid Control Circuit

GM:

Driver 2 Line 6

Honda:

Problem in PCM - toVTM - 4 Control Unit Communications Circuit

Jaguar:

Amplifier failure for valve sensor circuit malfunction

Lexus:

OCV Circuit Malfunction (Bank 1)

Lincoln:

CAN Link PCM - PCM Circuit - Network

Mercury:

CAN Link PCM - PCM Circuit - Network

Oldsmobile:

CAN Link PCM - PCM Circuit - Network

Porsche:

Coolant Shutoff Valve

Saab:

A /C Relay Coil Circuit. Open / Short to Ground.

Scion:

OCV Circuit.

Toyota:

OCV Circuit Malfunction Bank 1

Volkswagen/Audi:

A/C clutch relay circuit short to ground

Volvo:

A/C clutch relay circuit short to ground

Ford:

CAN LINK PCM / PCM CIRCUIT / NETWORK