Turbocharger Boost Control Position Sensor B Performance - Stuck High

Where it lives

For P259B, the description names the sensor as the part involved.

Check these first

• A dirty or failed turbocharger boost control position sensor B
• A failed wastegate actuator
• Incorrect sensor B calibration
• A vacuum leak in the intake system

What to do next

1. Read turbocharger boost control position sensor B on a scan tool
2. Inspect and clean the sensor B and its wiring
3. Check the wastegate actuator for a failed condition
4. Check the intake system for vacuum leaks
5. Replace the turbocharger boost control position sensor B if the actuator tests good
6. Clear the code and retest

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