Powertrain
generic / SAE
P236D
Cylinder 12 Pressure Variation Low
Cylinder-to-cylinder pressure variation on cylinder 12 is below the calibrated minimum — pressure stays unusually constant cycle-to-cycle, often a sign that the closed-loop combustion controller has lost authority or the sensor signal is filtered.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 6D
Possible causes
- Weak combustion - low cycle-to-cycle variation high
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2500 €
- Estimated time: 1.5–6 h
- Component: cylinder 12 combustion
- Component: cylinder pressure sensor 12
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012