Diagnostic Aids

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

The driver information center, if equipped, will display 'TRANSMISSION HOT- Idle Engine' when the transmission fluid temperature is greater than 132°C (270°F) for 10 minutes.
Ask about the customer's driving habits, trailer towing, etc.
Ensure the engine cooling system is functioning normally.
The hybrid powertrain control module will reduce drive motor generator torque at temperatures greater than 160°C (320°F). Drive motor generator torque is reduced to zero if the temperature reaches 190°C (374°F).