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
Often seen with P022C
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