Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection
Faulty Powertrain Control Module (PCM)
Engine Light ON (or Service Engine Soon Warning Light)
This message is used by the Transmission Control Module (TCM) in the transmission temperature sensor and transmission fluid temperature sensor performance detections. The Diagnostic Trouble Code (DTC) sets when the message is not received or stays unchanged for 10.5 seconds or more for two consecutive ignition cycles.