P1820

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.