P2359: Cylinder 10 Pressure Variation Low
What to do
The one code in this family where the sensor leads the suspect list — a trace too smooth to be real usually means the instrument, not the cylinder.
What this code means
Cylinder 10's pressure trace is varying less than expected — a reading suspiciously frozen where healthy combustion always breathes a little.
Where Variation High (P2350) is combustion genuinely unstable, Variation Low is usually the measurement gone flat: a sensor whose element has stiffened with age or soot reports the same rounded trace every cycle, and the module notices the physiological impossibility. A genuinely over-damped cylinder is rare; a tired sensor is not — which inverts the family's usual sensor-last ordering for this one variant.
Likely causes
Start here
- Faulty cylinder pressure sensor · moderate
- Sensor drifted out of calibration · moderate
Less common
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
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Community experience
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