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P0725

Symptom: CHECK GEARBOX warning lamp on.

P0725

Engine RPM Signal. Incorrect


Fault symptoms

CHECK GEARBOX warning lamp on.

Conditions

The input speed has exceeded 500 rpm after switching on the ignition.

Fault criteria

The TCM receives information from the bus, transmitted by the ECM, about the current engine speed. If the ECM transmits a message which says that the information is incorrect a P0725 diagnostic trouble code is generated.

Diagnostic help

The engine speed can be read with the diagnostic tool. - Choose " Read Values / Activate " and " Engine Speed (Bus from Trionic)"

Check the wiring

Jiggle the wiring harness at several points and in different directions to reveal intermittent breaks and short circuits in the various leads. Observe the multimeter, test lamp or diagnostic instrument while carrying out this check.