P1DC9 FIAT – Clutch Temperature Threshold Achieved Skip Shift Down Inhibit

P1DC9 FIAT Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1DC9 FIAT Possible Causes

Excessive amount of wide open throttle driving,Excessive amount of paddle shift usage in low gears

P1DC9 FIAT Description

The Transmission Control Module (TCM) performs several diagnostic checks to determine whether the temperature of a clutch is above a calibrated temperature value. These diagnostic checks use temperature models which are based upon input speed and output speed, current gear, target gear, calculated effective pressure on engaging clutch and on the disengaging clutch. The Diagnostic Trouble Codes (DTCs) set by these diagnostics are used to protect the durability of the clutches by controlling the shift operation. No repair action is required. This fault is only used to initiate a calibration strategy and for diagnostic information in case other faults are set.