OBD-II code · Powertrain (generic)
P03C8 Cylinder 6 Pressure Sensor Circuit Range/Performance
Cylinder 6 pressure sensor reads in range but plausibility check fails. 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.
Is it safe to drive with P03C8?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelySensor drift
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
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
- P0396Cylinder 1 Pressure Sensor Circuit Range/Performance
- P03A0Cylinder 2 Pressure Sensor Circuit Range/Performance
- P03AACylinder 3 Pressure Sensor Circuit Range/Performance
- P03B4Cylinder 4 Pressure Sensor Circuit Range/Performance
- P03BECylinder 5 Pressure Sensor Circuit Range/Performance
- P03C7Cylinder 6 Pressure Sensor Circuit
- P03D2Cylinder 7 Pressure Sensor Circuit Range/Performance
- P03DCCylinder 8 Pressure Sensor Circuit Range/Performance
- P2349Cylinder 9 Pressure Sensor Circuit Range/Performance
- P2353Cylinder 10 Pressure Sensor Circuit Range/Performance
- P235DCylinder 11 Pressure Sensor Circuit Range/Performance
- P2367Cylinder 12 Pressure Sensor Circuit Range/Performance
- P03C5Cylinder 5 Pressure Variation High
- P03C6Cylinder 5 Combustion Performance
- P03C9Cylinder 6 Pressure Sensor Circuit Low
- P03CACylinder 6 Pressure Sensor Circuit High
- P03CBCylinder 6 Pressure Sensor Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.