Powertrain
generic / SAE
P079B
Transmission Friction Element B Slip Detected
Same condition as element A slip, applied to friction element B (the second clutch or band).
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number7 / 9B
Possible causes
- Worn friction discs in element B high
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
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 600–4000 €
- Estimated time: 3–12 h
- Component: clutch pack b
- Component: transmission fluid
- MIL / check engine light
Sources
References
sae:J2012