Common Symptoms
- Check engine light illuminated
- Reduced engine power or turbo boost
- Poor acceleration under load
- Excessive black smoke from exhaust
- Rough running at higher RPMs
- Overboost or underboost condition
Most Likely Root Causes
- Faulty wastegate solenoid valve
- Vacuum or boost leak in wastegate control system
- Damaged or corroded wiring to wastegate solenoid
- Clogged wastegate solenoid filter or restricted air passage
- Failed wastegate actuator or stuck wastegate mechanism
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Component Location
The wastegate solenoid B is typically mounted on or near the turbocharger assembly or on the engine intake manifold area.
Manufacturer Notes
Some manufacturers use dual wastegate solenoids on twin-turbo or variable geometry turbocharger systems where solenoid B controls a specific wastegate function.
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