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P1624

Symptom: CHECK ENGINE lamp (MIL) on. CHECK GEARBOX lamp on. Transmission in limp-home mode.

P1624

CHECK ENGINE request


Fault symptoms

CHECK ENGINE lamp (MIL) on. CHECK GEARBOX lamp on. Transmission in limp-home mode.

Conditions

The transmission control module (TCM) has recorded an emission-related fault.

Diagnostic help

Diagnostic trouble code P1624 is generated when the transmission control module (TCM) detects an emission-related fault. The TCM sends a CHECK ENGINE request to the Motronic control module which then switches on the CHECK ENGINE lamp (MIL). See fault diagnosis in the "Automatic transmission" service manual.

Check the wiring

Intermittent faults may occur as a result of temporary short circuits and breaks in the wiring. Jiggle the wiring at several points and in different directions to ascertain whether the wiring harness, including any connectors, is causing the trouble. Observe the multimeter, ISAT scan tool or test lamp while doing this.

Diagnostic procedure

See fault diagnosis in Service Manual 4:2 "Automatic transmission".