Powertrain
generic / SAE
P03A1
Cylinder 2 Pressure Sensor Circuit Low
Cylinder 2 pressure sensor below lower plausibility — short to ground. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / A1
Possible causes
- Short to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
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