P2856
Clutch B Pressure Charge Performance
What it means
P2856 means Clutch B Pressure Charge Performance.
Check these first
- A clutch B that charges slower than commanded
- A restricted clutch B feed passage
- A failed clutch B pressure sensor
- A worn clutch B pack
What to do next
- Read clutch B pressure on a scan tool
- Command a clutch B apply and watch the pressure rise
- Check transmission fluid level and condition
- Test the clutch B feed passage for a restriction
- Replace the clutch B pressure sensor if the charge stays slow
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.