Cylinder 7 Pressure Too High

Check these first

• A pre-ignition or detonation event on cylinder 7
• Heavy carbon buildup raising compression on cylinder 7
• A failed cylinder 7 pressure sensor reading high
• A mismatched piston or head on cylinder 7
• Over-advanced timing on cylinder 7

What to do next

1. Check live cylinder 7 pressure against the other cylinders
2. Listen for detonation or ping on cylinder 7
3. Compare the cylinder 7 sensor to a known good one
4. Check base ignition timing and knock sensor data
5. Repair carbon or timing faults if the mechanical test confirms it
6. Clear the code and retest

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