Conditions for Setting the DTC

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

P06AC

TCM detects a 20-50° C (36-90°F) or greater difference between the transmission fluid temperature and TCM power up temperature, which depends on the average of transmission fluid temperature, TCM substrate temperature, and TCM power up temperature.
TCM detects an 8-10° C (14-18°F) or greater difference between the TCM substrate temperature and TCM power up temperature, which depends on the average of the transmission fluid temperature, TCM substrate temperature, and TCM power up temperature.
Above conditions have to be met for 5 min. within a 6 min. period.

P06AD

TCM power up temperature is -59°C (-74°F) or less for 1 min.

P06AE

TCM power up temperature is 164°C (327°F) or greater for 1 min.