Powertrain, generic (extended)

P22CA Turbocharger Compressor Outlet Switching Valve Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P22CA reports an open drive circuit for the compressor outlet switching valve. In two-stage or register boost systems the outlet flap is often moved by vacuum or pressure, and this electrically driven switching valve decides when that actuating medium reaches it; Ford's two-stage patent notes such valves may be worked electrically or by vacuum. With the circuit open, the switching valve stays in its rest position and the outlet flap no longer changes over. Nissan names the part on the Cummins 5.0 V8 diesel of the 2016 Titan XD (TC outlet switching valve, see P22CE), but no manufacturer publicly documents P22CA. The module detects the fault electrically with the output off, so it is independent of driving style. Check plug, harness and coil resistance first.

Likely causes

Switching valve connector loose or corroded
Broken wire between module and switching valve
Open coil in the switching solenoid
Faulty output stage in the engine control module

Symptoms

  • Check engine light on
  • Boost changeover no longer happens, power limited
  • Hesitation when accelerating through the switching speed

Repair estimate

DifficultyEasyDIY possible
Parts and labour€30–300
Time0.3–2 h

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

Parts involved

turbochargerboost switching valve

Related codes

P22CBP22CCP22CDP22CEP22C5

References: law.cornell.edu, patents.google.com, static.nhtsa.gov.