P022A
Charge Air Cooler Bypass Control A Circuit /Open
Turbo/boost control
Generic OBD-II
Low
What it means
P022A means the engine controller has detected an open (broken) electrical circuit for the charge air cooler bypass control. That bypass helps manage the temperature of the compressed intake air on a turbo/supercharged engine. With the circuit open, the controller can't operate the bypass, so it logs the fault. It's typically a wiring or actuator problem rather than anything that affects normal driving.
Low
Can I keep driving? Yes — the car drives normally in most conditions; you may notice slightly softer performance under hard load until it's fixed.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable driving symptoms
- Possible slight loss of performance or efficiency under heavy load
Common causes
Most likely first
- Open or broken wiring in the charge air cooler bypass control circuitLikely
- Failed bypass actuator or control solenoidCommon
- Loose, corroded, or disconnected connector at the actuatorCommon
- Failed engine control module (least likely)Less often
How to diagnose & fix
Work through it in order
- Scan for related boost or charge-air codes and read freeze-frame data.
- Inspect the bypass actuator connector and wiring for opens, corrosion, or damage — an open circuit is the named fault.
- Check the actuator/solenoid resistance against spec and confirm it gets power and ground.
- Repair or replace the wiring or actuator as needed; clear and re-test before condemning the ECM.
FAQ
Quick answers
Is it safe to drive with P022A?+
Yes. This is an emissions/performance-related circuit fault, not a safety issue — but get it fixed so boost and charge-air management work correctly.
Can I just clear P022A?+
It will return if the circuit is still open. Repair the wiring or actuator first, then clear it.
Related codes
Often seen with P022A
Read & clear P022A 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