OBD-II code · Powertrain (generic)
P03C7 Cylinder 6 Pressure Sensor Circuit
A general electrical fault on the cylinder 6 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.
Is it safe to drive with P03C7?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelySensor failed
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Cylinder Pressure Sensor
Related codes
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- P039FCylinder 2 Pressure Sensor Circuit
- P03A9Cylinder 3 Pressure Sensor Circuit
- P03B3Cylinder 4 Pressure Sensor Circuit
- P03BDCylinder 5 Pressure Sensor Circuit
- P03D1Cylinder 7 Pressure Sensor Circuit
- P03DBCylinder 8 Pressure Sensor Circuit
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- P2352Cylinder 10 Pressure Sensor Circuit
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- P2366Cylinder 12 Pressure Sensor Circuit
- P03C4Cylinder 5 Pressure Variation Low
- P03C5Cylinder 5 Pressure Variation High
- P03C6Cylinder 5 Combustion Performance
- P03C8Cylinder 6 Pressure Sensor Circuit Range/Performance
- P03C9Cylinder 6 Pressure Sensor Circuit Low
- P03CACylinder 6 Pressure Sensor Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.