P28C8
Clutch A Pump Motor Performance
What it means
P28C8 means Clutch A Pump Motor Performance.
Where it lives
For P28C8, start at the pump the description names.
Check these first
- A weak clutch A pump motor
- Contaminated fluid restricting the clutch A pump
- A worn clutch A pump seal losing pressure
- An internal leak in the clutch A pump circuit
- Low fluid level starving the clutch A pump
What to do next
- Read clutch A pump motor data on a scan tool
- Check transmission fluid level and condition
- Command the clutch A pump and watch motor current and speed
- Inspect the clutch A pump for restriction or wear
- Replace the clutch A pump motor assembly if performance stays low
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.