P2D22Turbocharger Interstage Pressure Sensor A Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2D22 flags an interstage pressure reading that is electrically valid but implausible, for instance offset, stuck or out of step with the other pressures. No manufacturer documents a detection rule. A Cummins patent on a two-stage engine shows what plausible means: with the compressor bypass valve open, interstage and charge pressure should be almost the same, about 102 kPa at 600 rpm and 119 kPa at 2,000 rpm; a service test compares both speeds, and if charge pressure and turbo speed check out while a code is stored, the interstage sensor is the suspect. California requires rationality checks for such inputs. A sensor that reads wrong can mislead the boost split between the stages.
- What you may notice
- Check engine light
- Uneven boost build-up or reduced power
- Possible boost deviation codes alongside
- Likely causes
- LikelySensor element drifted or offset
- PossibleSensor port clogged with oil or soot deposits
- PossibleLeak in the duct or intercooler between the stages
- RareStage bypass valve stuck, giving pressures the model does not expect
- 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 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.