Powertrain, generic (extended)

P2D24 Turbocharger Interstage Pressure Sensor A Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Open sensor ground or corroded ground pin
Open signal wire pulled up by the controller
Signal wire shorted to 5 V reference or battery voltage
Sensor electronics failed high

Symptoms

  • Check engine light
  • Power reduced, boost held back
  • Interstage pressure reads high even with the engine off

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–600
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

turbo interstage pressure sensor awiring harnessecm

Related codes

P2D23P2D21P2D22P2D25P0242

References: patents.google.com, fordservicecontent.com, law.cornell.edu.