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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 P1521:

Chrysler/Dodge/Jeep:

Incorrect Engine Oil Type

Citroen/Peugeot:

Variable Intake Solenoid #1 Circuit Malfunction

Daewoo:

PWR STEERING SW MAL

Fiat:

Contact voltage supply

Ford:

Variable Intake Solenoid #1 Circuit Malfunction

GM:

Transmission Engaged at High Throttle Angle

Hyundai:

Power Steering Switch Input Circuit

Mazda:

VRIS Solenoid '1' Circuit

Mercedes:

Variable Resonance Induction System Solenoid #1 Circuit

Volkswagen/Audi:

Intake Manifold Changeover Valve2 circuit electrical malfunction

Volvo:

Intake Manifold Changeover Valve2 circuit electrical malfunction