P274F
Transmission Fluid Temperature Sensor C Over Temperature Condition
The third transmission fluid temperature sensor reports an over-temperature condition.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
Ordered by how often each turns out to be the cause.
- Restricted transmission fluid coolerCommon
- Sustained heavy load such as trailer towingPossible
- Low transmission fluid levelPossible
Parts involved
- Trans Fluid Temp Sensor C
- Transmission Fluid
- Cooler
P274F is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.