Turbocharger Boost Control Position Sensor Performance
Boost control sensor indicates incorrect position.
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What it means (plain English)
The computer expects the turbo boost control position sensor to read a certain voltage range when the turbo is activated. If it doesn't match, it triggers this code.
What the computer is actually seeing
The computer monitors the voltage from the boost control position sensor, which should vary from 0.1V at low boost to around 4.5V when the turbo is fully engaged.
What a healthy reading looks like
Sensor voltage should be between 0.5V and 4.5V during operation under load.
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. Inspect the wiring and connectors at the boost control sensor for damage or corrosion. Fix any issues found. Decision point: Are the wiring and connectors okay? Yes - go to step 2; No - repair wiring/connectors and retest.
- 22. Using a multimeter, measure the voltage output of the boost control position sensor with the engine running under load. Decision point: Is the voltage in the range of 0.5V to 4.5V? Yes - go to step 3; No - replace the boost control position sensor.
- 33. Check turbocharger operation; ensure the linkage and wastegate move freely and there are no obstructions. Decision point: Is the turbo operating smoothly? Yes - potential ECU issue; No - repair turbocharger.
Common causes
- Damaged or corroded wiring
- Faulty boost control position sensor
- Issues with the turbocharger itself (such as sticking)
- ECU software issue
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but may cause reduced performance or efficiency; recommend addressing soon.
Will the code come back after clearing?
If the underlying issue isn't fixed, it’s likely to return.
Could this affect my exhaust emissions?
Yes, improper turbo operation can lead to higher emissions.
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