What it means
The compressor outlet switching valve is detected as stuck closed. This may prevent the expected switching of the compressor outlet flow and affect boost response.
At a glance
- Usually lights the check-engine light
How it works
The compressor outlet switching valve directs airflow between stages in a sequential turbocharging system. The engine control module detects that the valve remains closed when it expects it to open, setting P22CE. The blocked airflow path can interfere with boost response as the system changes stages.
Common causes
Most likely first.
- Valve stuck closed
- Carbon or debris buildup preventing free movement
- Component wear with age - mechanical play
Symptoms
- Check engine light on
- Reduced engine power or poor acceleration
- Possible abnormal boost response
How to diagnose it
- Record freeze-frame data and review live boost and valve data, if available, to identify the conditions when the valve was expected to open.
- Inspect the compressor outlet valve and intake passages for obstructions, damaged parts, or a valve that is visibly not moving.
- Check the actuator and linkage for binding, then look for carbon or debris holding the valve closed.
- Inspect the valve wiring and connector for loose pins, corrosion, or damage that could prevent commanded movement.
- If the mechanism and wiring look sound, test actuator command and valve movement according to the manufacturer's procedure.
Common fixes
- Clear carbon or debris preventing the compressor outlet switching valve from opening.
- Repair damaged wiring or corroded or loose connector terminals.
- Free or repair a binding valve linkage or actuator.
- Replace the compressor outlet switching valve if it remains stuck closed after inspection and cleaning.
Can I keep driving?
Gentle driving may be possible if power is normal, but avoid hard acceleration and towing because boost response may be impaired. Stop if the engine loses substantial power or develops abnormal turbo noise.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.