P2356Cylinder 10 Pressure Sensor Circuit Intermittent/Erratic
- 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
- P2356 points to a cylinder 10 pressure signal that drops out or jumps for moments instead of failing permanently. No manufacturer covers cylinder 10 publicly. For four-cylinder TDI engines, a 2014 Volkswagen bulletin lays out a sensible order: first push and pull the glow plug connector – a felt click or a plug that comes off easily is already the fault – then swap the plug with a neighbouring cylinder to see whether the code moves with it, and finally move the harness while watching the maximum cylinder pressure value. On a V10 with bank-wise numbering the obvious swap partner is cylinder 9 in the same bank. According to VW, the MIL can need a second drive cycle. In Saab's GM-built diesel, the erratic codes react after only 0.2 s out of range.
- What you may notice
- Warning lamp that comes and goes
- Fault hard to reproduce in the workshop
- Likely causes
- LikelyConnector not fully seated, contact lost under vibration
- PossibleWire break inside the insulation or chafe point that opens intermittently
- PossibleGlow plug sensor electronics failing intermittently
- 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: €40 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.