OBD
P079F
Transmission Friction Element F Slip Detected
What it means
P079F means Transmission Friction Element F Slip Detected.
Check these first
- A worn or glazed clutch pack or band F
- Low or degraded transmission fluid
- A solenoid or valve body fault on element F
- A blocked fluid passage feeding element F
- A TCM calibration fault
What to do next
- Read friction element F slip data on a scan tool
- Check the fluid level and condition
- Test the solenoid and valve body on element F
- Test line pressure and the apply circuit
- Rebuild the transmission if the element is worn
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.