Turbocharger Boost Control Position Sensor Circuit High
Indicates a high reading in the turbocharger boost control sensor circuit.
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What it means (plain English)
The turbocharger boost control position sensor is sending a voltage reading that's higher than normal, which can cause performance issues.
What the computer is actually seeing
The engine control module (ECM) expects a voltage from the boost control sensor between 0.5V and 4.5V, and anything above that threshold is flagged as high.
What a healthy reading looks like
0.5V to 4.5V from the sensor under normal operation.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the vehicle's wiring and connectors to the turbocharger boost control position sensor for damage, corrosion, or loose connections. Repair as necessary.
- 22. Measure the voltage at the sensor connector with the key on and engine off. It should be between 0.5V and 4.5V. If higher, proceed to step 3. If within range, suspect a faulty ECM or programming issue.
- 33. Inspect the boost control position sensor for proper operation. If faulty, replace the sensor and clear the code.
- 44. If the sensor is functioning but the code persists, check the turbocharger actuator for correct operation and any binding or mechanical issues. Fix as needed.
Common causes
- Faulty boost control position sensor
- Wiring issues between the sensor and ECM
- Faulty turbocharger or actuator assembly
- Loose or corroded connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's safe to drive, but power loss may occur, and it could worsen the issue if ignored.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, the code will likely reappear.
Why do I see this code with SPN 2766?
SPN 2766 relates to low readings from the same circuit; both can indicate issues with the sensor or wiring.
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