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P1820

Symptom: CHECK GEARBOX warning lamp is on. TCM in Limp-Home mode.

P1820

Accelerator Pedal Position. Error message from ECM

Fault symptoms

CHECK GEARBOX warning lamp is on.

TCM in Limp-Home mode.

Conditions

Engine running.

Fault criteria

TCM receives information on the current accelerator pedal position on the bus from ECM. If ECM sends a message saying this information is incorrect, DTC P1820 will be generated.

Diagnostic help

This diagnostic trouble code indicates a fault in the ECM. Refer to fault diagnosis for the engine management system in question.