Powertrain, generic (extended)

P22CC Turbocharger Compressor Outlet Switching Valve Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P22CC indicates that the drive line of the compressor outlet switching valve carries more voltage or current than allowed, usually a short to a battery feed or a solenoid with shorted windings. The output stage of the engine control module then tends to shut down for self-protection, which leaves the switching valve unpowered and the outlet flap in its rest position. On register or two-stage charging this typically means the second compressor branch is no longer brought in or taken out as planned. The test is electrical and continuous, as CARB requires for monitored output parts. No manufacturer publicly documents P22CC. Measure coil resistance against the specification and check whether the wire touches a positive feed; replacing the module is a last resort.

Likely causes

Control wire shorted to a battery-voltage feed
Shorted windings in the switching solenoid
Faulty output stage in the engine control module

Symptoms

  • Check engine light on
  • Outlet flap no longer switches, power reduced
  • Fault returns as soon as the valve is commanded

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

boost switching valve

Related codes

P22CAP22CBP22C7

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