P2D24Turbocharger Interstage Pressure Sensor A Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2D24 is the opposite case to P2D23: the interstage pressure signal is pinned near or above the top of its range. On a three-wire sensor this usually points to an open ground, a signal wire touching the 5 V reference or battery voltage, or an open signal line pulled up inside the controller. Ford's 2023 diesels, as a comparable pressure sensor example, set circuit high above 4.85 V. No manufacturer documents P2D24 or its threshold. Cummins places the sensor between the low- and high-pressure stages ahead of the charge air cooler. California requires out-of-range monitoring. A falsely high value can make the controller think the low-pressure stage overboosts and cut its output.
- What you may notice
- Check engine light
- Power reduced, boost held back
- Interstage pressure reads high even with the engine off
- Likely causes
- LikelyOpen sensor ground or corroded ground pin
- PossibleOpen signal wire pulled up by the controller
- PossibleSignal wire shorted to 5 V reference or battery voltage
- RareSensor electronics failed high
- 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: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.