P27F3
Clutch B Temperature Too High
The transmission control unit measures clutch B temperature above the safe operating threshold. Repeated slip events or excessive load have heated the clutch pack.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
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.
- Excessive clutch slip during launchesCommon
- Degraded transmission fluid lowers heat capacityPossible
Parts involved
- Clutch B
- Transmission Fluid
- TCM
P27F3 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.