Common Symptoms
- Check Engine Light illuminated
- Reduced engine power or limp mode activation
- Poor acceleration or turbo boost response
- Rough idle or hesitation under load
- Black smoke from exhaust under acceleration
Most Likely Root Causes
- Faulty turbocharger boost control position sensor
- Damaged or corroded wiring harness to boost control sensor
- Short to voltage in sensor circuit wiring
- Failed turbocharger wastegate actuator
- ECM internal fault or software issue
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Component Location
The turbocharger boost control position sensor is typically mounted on the turbocharger assembly or wastegate actuator.
Manufacturer Notes
Some manufacturers use a potentiometer-type sensor on the wastegate actuator that is sensitive to moisture and corrosion.
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