P2359Cylinder 10 Pressure Variation Low
- 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
- P2359 means the pressure trace of cylinder 10 changes too little: the build-up through compression and combustion is flatter than the ECM expects. No manufacturer documents this code for cylinder 10. Saab's 9-5 diesel lists the cylinder-1 analogue P039C with three sub-types, 00, 01 and 02, and counts it as a signal performance fault that reacts after 0.2 s out of range; what separates the sub-types is not explained there. BorgWarner's sensor glow plug passes the pressure through a flexible heater rod onto a measuring diaphragm, so a rod jammed by carbon or a stiff diaphragm flattens the curve. A cylinder with hardly any compression looks the same. In a V10 firing 1-6-5-10-2-7-3-8-4-9, as Ford's 6.8 L and Audi's 5.2 do, cylinder 10 is the fourth to fire.
- What you may notice
- Check engine light on
- Engine behaviour usually unchanged
- Likely causes
- LikelyHeater rod stuck in carbon, pressure no longer reaches the diaphragm
- PossibleSensing element has lost sensitivity
- RareCylinder 10 builds up hardly any pressure
- 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: €100 – €550
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.