P2357Cylinder 10 Pressure Too 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
- P2357 is not about the wiring: the pressure measured or modelled for cylinder 10 itself is below expectation while the sensor circuit tests fine. No manufacturer publishes this code, and the cylinder-1 counterpart P039A is equally undocumented. On a V10 such an evaluation also has to know when low pressure is intended – Audi's R8 V10, for instance, cuts injection and ignition on a whole bank under light and moderate load. Outside such phases, too little pressure suggests weak combustion from an injector delivering short, compression lost through a valve or worn rings, gas escaping past the glow plug seal, or a sensor reading low. Expect rough idle, more smoke and higher consumption; the cylinder 10 misfire code P0310 frequently comes along.
- What you may notice
- Check engine light on
- Rough running, mainly at idle
- More smoke and higher fuel consumption
- Likely causes
- PossibleInjector of cylinder 10 delivering too little fuel
- PossibleCompression loss from valve leakage or worn rings
- PossibleCombustion gas leaking past the glow plug seal
- RarePressure sensor reading too low
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.