Conditions for Setting the DTC

P0667

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

P0668 

TCM internal temperature is 254°C (489°F) or greater for 1 min.

P0669 

TCM internal temperature is -254°C (-425°F) or less for 1 min.