Powertrain
Definition only
Lights the check engine lamp
P2879: Clutch B Performance/Stuck Disengaged
Standardized SAE J2012 code · P28xx codes
What does P2879 mean?
Clutch B cannot leave the disengaged state when engagement is commanded. No torque transfer through this clutch.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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
- High Clutch actuator stuck at low pressure
- Medium Severe hydraulic leak prevents engagement
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2879 on the same make and model first.
P2879 in the community
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