P22CA
Turbocharger Compressor Outlet Switching Valve Control Circuit/Open
The drive circuit for the turbocharger compressor outlet switching valve is open. On twin-turbo or sequential boost setups, this valve routes the compressor outlet between low-pressure and high-pressure stages.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Common causes
Ordered by how often each turns out to be the cause.
- Solenoid winding openCommon
- Pin pushed back out of connector bodyLess likely
- Cracked solder joint inside the module or sensorLess likely
Parts involved
- Turbocharger
- Boost Switching Valve
P22CA is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.