P235CCylinder 11 Pressure Sensor Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P235C stands for a fault in the circuit of the cylinder 11 combustion pressure sensor without saying whether the signal is too low or too high. A V10 ends at cylinder 10, so only twelve-cylinder engines have an eleventh one. With bank-wise numbering, cylinder 11 is the second-to-last of the second bank, between 10 and 12. Production engines combining twelve cylinders with combustion pressure sensors are not on public record, and no manufacturer documents P235C; the description rests on CARB's circuit monitoring rules and the cylinder-1 counterpart P0395. In Saab's 9-5 diesel the ECM wires each such sensor with a 5 V supply, a ground return and a signal line, and a fault in any of the three can trigger the code. Driving is normally unaffected.
- What you may notice
- Check engine light on
- No change in how the engine runs
- Likely causes
- LikelyConnector at the cylinder 11 glow plug loose or corroded
- PossibleReference, low reference or signal wire damaged
- PossibleSensor electronics in the glow plug failed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.