OBD
P236E
Cylinder 12 Pressure Variation High
What it means
P236E means Cylinder 12 Pressure Variation High.
Check these first
- Uneven compression in cylinder 12
- A weak cylinder 12 fuel injector
- A worn cylinder 12 spark plug or ignition coil
- A failed cylinder 12 pressure sensor
What to do next
- Read cylinder 12 pressure variation on a scan tool
- Perform a compression test on cylinder 12
- Test the cylinder 12 fuel injector and ignition coil
- Compare cylinder 12 pressure to its neighbors
- Replace the cylinder 12 pressure sensor if the ignition and fuel tests pass
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.