P022C code meaning
Charge Air Cooler Bypass Control A Circuit High
Powertrain system Generic code P02xx codes Check engine light
What P022C means
The charge air cooler bypass is a flap or valve that routes compressed air around the charge air cooler, so the engine and exhaust warm up faster after a cold start; when warm it closes or opens partly to control intake air temperature. It is driven by an electric motor with a built-in position sensor or by a solenoid and vacuum can. P022C means the drive circuit reads high – typically the control wire shorted to voltage, so the driver cannot switch it. The module then switches bypass control off and the flap stays in its rest position. No manufacturer document using this code was found – GM and Ford do not use the bypass codes; the description rests on CARB's component monitoring requirement and a Bosch patent on the bypass valve.
P022C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P022C
- Check engine light on
- Depending on the rest position: longer warm-up or higher charge air temperature with slight loss of power
- Often nothing noticeable while driving
Common causes of P022C
- Most likelyControl wire shorted to voltage
- PossibleActuator shorted internally (overcurrent)
- PossibleMoisture or corrosion in the connector
- Less likelyDriver stage in the engine module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Charge air cooler bypass actuator aActuator wiringEngine control module
What each part of P022C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 2 | Area: fuel and air metering (injector circuit). |
| 2C | The exact fault in that area. |
What to do next
- Note P022C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P022C
What does P022C mean?
P022C means "Charge Air Cooler Bypass Control A Circuit High". The charge air cooler bypass is a flap or valve that routes compressed air around the charge air cooler, so the engine and exhaust warm up faster after a cold start; when warm it closes or opens partly to control intake air temperature. It is a generic code, so it means the same on every make.
Is it safe to drive with P022C?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P022C fail an emissions test?
Yes, it can. P022C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P022C to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P022C clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.