P17EC BMW – Ratio Monitoring Shift 5-4

P17EC BMW Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P17EC BMW Possible Causes

Transmission Mechanical Problems,Faulty Transmission Assembly

P17EC BMW Description

The Transmission Control Module (TCM) monitors the Shift Ratio. The TCM sets the OBDII code when the Shift Ratio is not to factory specifications.