"Situation: the transmission may be unable to shift from park (p) and a 'gearbox fault' message may...

Bulletin number

LTB00677NAS1

Component

Power train: automatic transmission: control module (TCM/PCM/tecm)

Summary

"situation: the transmission may be unable to shift from park (p) and a 'gearbox fault' message may displayed in the instrument cluster. Upon investigation, the following diagnostic trouble codes (dtc) will be stored: • u0001-81 (transmission control module [TCM]) • u0402-2a (transmission control switch [tcs]) • u0001-81 (anti-lock brake system ([ABS] control module) in addition, the following dtcs may be stored: • u0402-92 (transmission control switch [tcs]) • u0592-00 (engine control module [ECM]) this bulletin does not apply if dtc p0850-02, p0850-29 and/or p1707-72 is stored in the TCM. Refer to ssm71813 if any of these dtcs are stored. Cause: this may be caused by a communications issue between the central junction box (cjb) and the TCM."

Owners of these vehicles have filed 2 complaints in the transmission category.