P022E
Charge Air Cooler Bypass Control B Circuit Low
Turbo/boost — charge air cooling
Generic OBD-II
Low
What it means
P022E means the ECM detected a low-voltage (short-to-ground or open-low) condition in the 'B' control circuit for the charge air cooler bypass. This valve routes intake air around or through the intercooler to manage charge temperature; a circuit fault mostly affects cooling efficiency and boost performance rather than everyday driveability.
Low
Can I keep driving? Safe to drive — you may notice slightly reduced performance or higher intake temperatures under sustained boost, but the car remains driveable.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable driving symptoms
- Possible reduced performance or knock under sustained boost
Common causes
Most likely first
- Short-to-ground or low voltage in the charge air cooler bypass control 'B' circuit wiringLikely
- Failed bypass control solenoid/actuatorCommon
- Corroded or loose connector at the bypass actuatorCommon
- Faulty ECM driver (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the bypass control 'B' connector and wiring for shorts or damage.
- Measure the control circuit voltage and resistance against the solenoid's spec.
- Repair shorted or grounded wiring, or replace the bypass control solenoid if it's out of spec.
- Clear the code and re-test under a boost cycle to confirm it stays off.
FAQ
Quick answers
Is it safe to drive with P022E?+
Yes. This is a boost-side charge-air-cooling actuator circuit; the worst you'll see is slightly reduced performance or higher intake temps under load. Fix it to keep the intercooler working properly.
Can I just clear P022E?+
It will come back if the wiring short or failed solenoid is still present. Repair the circuit first, then clear it.
Related codes
Often seen with P022E
Read & clear P022E 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