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OBDII/EOBD diagnostics trouble codes definition

If your car is equipped with OBD-II or EOBD, you can access over 5,000 generic OBD-II diagnostic trouble codes (DTCs). These codes cover various vehicle systems, including Powertrain (P0XXX, P2XXX, P34XX), Body (B0XXX), Chassis (C0XXX), and Network/Communication (U0XXX, U2XXX, U3XXX). Additionally, there are more than 13,500 manufacturer-specific OBD-II codes available for diagnosing issues unique to different car brands and models. Make sure you're equipped with the right tools to understand and resolve these trouble codes to keep your vehicle running smoothly.

By using these OBD-II codes, you can effectively diagnose issues related to engine performance, safety features, suspension, and more.

Supported manufacturers with specific OBD2 codes:

Enter code:
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Definition of check engine code P1781:

Chrysler/Dodge/Jeep:

Pressure switch circuit: OD

Citroen/Peugeot:

4X4 Switch Out of Self Test Range

Daewoo:

ACTUATOR MAL

Ford:

4X4 Switch Out of Self Test Range

GM:

Engine Torque Signal Circuit

Lincoln:

4x4 Low Switch is Out of Self-Test Range

Mazda:

Transmission 4x4 Low Switch out of Range Fault

Mercedes:

Upshift delay switchover valve (AT/CC) (Y3/5)

Mercury:

4x4 Low Switch is Out of Self-Test Range

Oldsmobile:

4x4 Low Switch is Out of Self-Test Range

Opel:

CAN data bus,ECM actual torque signal - malfunction detected

Volkswagen/Audi:

Engine Torque Reduction Open / Short to Ground

Volvo:

Engine Torque Reduction Open / Short to Ground
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