Turbocharger/Supercharger Wastegate Solenoid B Range/Performance
Common Symptoms
- Check Engine Light illuminated
- Reduced engine power or turbo boost
- Poor acceleration or sluggish throttle response
- Black smoke from exhaust under load
- Audible hissing or whistling noise from turbo area
- Increased fuel consumption
Most Likely Root Causes
- Faulty wastegate solenoid B
- Vacuum or boost leak in wastegate control circuit
- Stuck or binding wastegate actuator linkage
- Clogged or damaged vacuum lines to wastegate solenoid
- Corroded or damaged wiring to wastegate solenoid
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Component Location
Wastegate solenoid B is typically mounted on or near the turbocharger assembly or on the intake manifold with vacuum lines connecting to the wastegate actuator.
Manufacturer Notes
Some manufacturers use dual wastegate solenoid systems for variable geometry turbos or twin-turbo configurations where solenoid B controls secondary boost control.
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