P1DAC FIAT – Engine Speed Undetermined

P1DAC FIAT Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1DAC FIAT Possible Causes

Check for other Powertrain Control Module (PCM) codes

P1DAC FIAT Description

This diagnostic monitors for a double failure of the Engine Speed signal received via Controller Area Network (CAN) and an electrical or rationality failure of the Input Speed Sensor. If the Transmission Control Module (TCM) detects a failure with both tests this Diagnostic Trouble Code (DTC) will set.