P1DF3 FIAT – ECU Nnot Initialized

P1DF3 FIAT Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1DF3 FIAT Possible Causes

Faulty Electronic Shift Module (ESM),Faulty Transmission Control Module (TCM)

P1DF3 FIAT Description

The purpose of the diagnostic is to monitor the time period of the Electronic Shift Module (ESM) initialization state. The Transmission Control Module (TCM) receives the status of the initialization state from the ESM on the Controller Area Network (CAN) bus while evaluating a counter in the TCM to determine if the initialization time is excessive.