P2369Cylinder 12 Pressure Sensor Circuit High
- 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
- P2369 means the cylinder 12 pressure input reads above its upper limit. Like the rest of the cylinder-12 family, it is not documented publicly by any maker. On Saab's 9-5 diesel the matching cylinder-1 code P0398 is set after more than 2 s above the threshold and is evaluated once per operating cycle. An unplugged sensor drives the value past 10,000 kPa, so to the ECM an open signal or open low-reference wire looks the same as a short to voltage. Saab tells the cases apart with a fused jumper between signal and low reference: the reading should then drop below 50 kPa; if it stays high, the fault lies in the wiring towards the ECM, otherwise in the plug. While the code is active, the ECM has no usable pressure feedback from this cylinder.
- What you may notice
- Check engine light after the second trip
- Cylinder 12 shows an impossibly high pressure in live data
- Likely causes
- LikelySignal or low-reference wire open
- PossibleSignal shorted to a voltage source
- RareGlow plug sensor electronics outputting a fixed high value
- 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 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.