Powertrain, generic (extended)

P22C7 Turbocharger Compressor Outlet Valve Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P22C7 means the drive line of the compressor outlet valve reads higher than the module expects, typically because the wire has a short to battery voltage or the coil draws excessive current while the driver is on. Modern output stages notice the overcurrent and switch off to protect themselves, so the valve then stops responding even though nothing is open. The valve itself belongs to the boost path of register, two-stage or e-compressor charging, where it controls whether a compressor delivers into the intake. Electrical checks like this run continuously under the CARB rules for monitored output components. No manufacturer publicly documents P22C7. Compared with the open-circuit code P22C5 and the low-voltage code P22C6, the search here focuses on rubbed wires touching a positive feed or a shorted actuator winding.

Likely causes

Control wire shorted to a battery-voltage feed
Shorted turns in the valve coil causing overcurrent
Replacement valve with unsuitable coil resistance
Faulty output stage in the engine control module

Symptoms

  • Check engine light on
  • Valve no longer switches, boost reduced
  • Code returns immediately after clearing

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–450
Time0.5–2.5 h

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

Parts involved

diverter valve

Related codes

P22C5P22C6P22CC

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