Turbocharger Wastegate Position Sensor Circuit Low
Indicates that the wastegate position sensor circuit is reporting a low voltage.
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What it means (plain English)
The computer thinks the wastegate position sensor is reading a voltage lower than expected, which can mess with how much boost the engine gets.
What the computer is actually seeing
The control module receives a signal from the wastegate position sensor that is below the normal operating voltage, usually under 0.3V when it should be around 0.5V to 4.5V depending on the system.
What a healthy reading looks like
Expected voltage from the wastegate position sensor is typically between 0.5V and 4.5V, depending on the design.
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 wiring and connectors at the wastegate position sensor. Look for frays, breaks, or corrosion. Repair as needed.
- 22. Measure the voltage at the wastegate position sensor with the key on and the engine off. It should be within 0.5V to 4.5V.
- 33. If the voltage is low, test for continuity from the sensor to the ECM to rule out a broken wire. Repair as needed.
- 44. If the wiring is good, replace the wastegate position sensor and retest.
- 55. If the problem persists, inspect the ECM for faults.
Common causes
- Faulty wastegate position sensor
- Damaged wiring or connectors
- Wiring short to ground
- Poor ground connection to the sensor
- Faulty Engine Control Module (ECM)
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, but expect reduced power and efficiency until it's fixed.
Will this code return after fixing?
If the issue is properly repaired, the code should not return.
Why does this code show up with other codes?
It's common for wastegate sensors to fail or show symptoms along with other related turbo and boost control codes.
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