P022C
Charge Air Cooler Bypass Control A Circuit High
Turbo / charge-air cooling
Generic OBD-II
Low
What it means
P022C means the control circuit for charge-air-cooler bypass valve A is reading a higher voltage than expected — usually an open circuit or a short to power on the valve's control wire. The bypass valve that routes intake air around the intercooler may be stuck, hurting intake-air temperature control, but the engine still runs.
Low
Can I keep driving? Yes — this circuit manages intake-air cooling, not engine running, so the car drives normally while you get it repaired.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable change in how the car drives
- Possible slight loss of performance or efficiency under load
Common causes
Most likely first
- Open circuit or short to power in the bypass-valve control wiringLikely
- Failed charge-air-cooler bypass control valve or solenoidCommon
- Corroded or disconnected valve connectorCommon
- Rarely, a failed control-module driverLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame and inspect the bypass-valve connector and control wiring for opens or shorts to power.
- Measure the valve/solenoid resistance and compare it to spec.
- Check the control circuit for continuity back to the module.
- Replace the bypass valve if the winding is open or out of spec; repair the wiring otherwise.
- Clear the code and re-test.
FAQ
Quick answers
Is it safe to drive with P022C?+
Yes, generally. This is an intake-air temperature management circuit, not a running or safety system, so the engine drives normally. Fix it to keep charge-air cooling working properly.
Can I just clear P022C?+
You can, but an open or shorted control circuit will set it again. The wiring or valve needs repair for the code to stay off.
Related codes
Read & clear P022C yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX