DTC 19 - P1716

Name of Code:
P-0716(19) - Bus Communication with Engine Module

When Monitored: Continuously with key on.

Set Condition: If no bus messages are received from the Powertrain Control Module (PCM) for 10 seconds.

Theory of Operation: The TCM communicates with the PCM using the bus. It relies on certain information to function properly. The TCM continuously monitors the bus to check for messages broadcast from the PCM.

Transmission Effects: Delayed 3-4 shifts. No EMCC and early 3-4 shifts for a few minutes after engine is started.

Possible Causes:
- Open or shorted CCD bus(+) or CCD bus(-) circuits
- Bus bias problem
- TCM
- PCM