Powertrain, generic (extended)

P2D22 Turbocharger Interstage Pressure Sensor A Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Sensor element drifted or offset
Sensor port clogged with oil or soot deposits
Leak in the duct or intercooler between the stages
Stage bypass valve stuck, giving pressures the model does not expect

Symptoms

  • Check engine light
  • Uneven boost build-up or reduced power
  • Possible boost deviation codes alongside

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–800
Time0.5–3 h

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

Parts involved

turbo interstage pressure sensor awiring harnessecm

Related codes

P2D21P2D23P2D24P2D25P0240P2263

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