Powertrain
generic / SAE
P03A4
Cylinder 2 Pressure Too Low
Cylinder 2 measured peak combustion pressure is below the calibrated minimum — typically low compression, weak injection, or stuck-open exhaust valve.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / A4
Possible causes
- Low compression on cylinder 2 high
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–4000 €
- Estimated time: 2–8 h
- Component: cylinder pressure sensor
- Component: fuel injector
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012