Powertrain
generic / SAE
P03A9
Cylinder 3 Pressure Sensor Circuit
A general electrical fault on the cylinder 3 combustion pressure sensor — used on engines with closed-loop combustion control (e.g. some Volvo and BMW direct-injection diesels) to measure cylinder pressure directly via a sensor at the glow plug or injector position.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / A9
Possible causes
- Sensor failed high
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–4 h
- Component: cylinder pressure sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012