Conditions for Setting the DTC

P0667

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

P0668 

The TCM internal temperature is -249°C (-416°F) or less for 1 min.

P0669 

The TCM internal temperature is 249°C (480°F) or greater for 1 min.