P235DCylinder 11 Pressure Sensor Circuit Range/Performance
- 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
- P235D is set when the combustion pressure reported for cylinder 11 is electrically valid yet does not fit the engine's state – for example a compression peak that is clearly off while no fuel is being injected. Only engines with twelve cylinders have a cylinder 11, and none of them is publicly documented with pressure sensors, so no manufacturer describes this code. CARB demands rationality checks of input components in both directions, reading too high and too low. BorgWarner's piezo-resistive pressure glow plug is calibrated and programmed specifically for each customer: a plug taken from another engine application can therefore read wrong while being electrically sound. Carbon on the heater rod or a leaking seal at the plug seat are other likely causes. The cylinder-1 counterpart is P0396; drivers seldom notice more than the lamp.
- What you may notice
- Check engine light on
- Driving behaviour practically unchanged
- Likely causes
- LikelyDeposits on the heater rod distort the reading
- PossibleGlow plug with calibration for another engine application fitted
- PossibleSeal at the glow plug seat leaking
- 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: €80 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.