$71 (P1797)- Manual Shift Overheat

Name of code: $71 (P1797)- Manual Shift Overheat

When monitored: Whenever the engine is running.

Set condition:
1) If the engine temperature exceeds 255°F while operating in AutoStick mode.
2) If the transmission temperature exceeds 275°F while in AutoStick mode.

Theory of operation: Transmission and engine temperatures are monitored during vehicle operation. If conditions occur causing the engine or transmission to overheat, the AutoStick mode will be canceled, and a code will be set.

Transmission Effects: The "Y position shift schedule that is used in non-AutoStick applications is substituted while operating in the AutoStick gear selector position. No limp-in mode occurs.

Possible causes:
- Engine overheat - refer to Cooling System for diagnosis and repair
- Transmission Overheat
- Restricted transmission cooling system
- Transmission fan not functioning properly
- Transmission fluid overfilled
- Radiator fan not functioning properly
- Extended driving in low gear

Note: Strenuous driving conditions may cause the vehicle to overheat. If the driver operates in or initiates AutoStick with an overheated vehicle, the code will be set.