OBD
P088B
Transmission Fluid Filter Very Deteriorated
What it means
P088B means Transmission Fluid Filter Very Deteriorated.
Check these first
- A transmission filter nearly plugged
- Heavy debris in the transmission fluid
- A failing clutch pack
- A transmission cooler that is restricted
What to do next
- Check the transmission fluid condition
- Read the filter life data on a scan tool
- Drop the pan and inspect the filter
- Check the transmission cooler for a restriction
- Replace the filter and fluid right away
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.