Turbocharger Wastegate Control Position
Fault in the wastegate control position of the turbocharger.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer is getting a reading from the turbo wastegate that doesn't match what it's expecting, which means the turbo might not be controlling boost pressure correctly.
What the computer is actually seeing
The Engine Control Module (ECM) expects a specific feedback voltage (typically between 0.5V and 4.5V) from the wastegate position sensor that corresponds to its actual position. If the reading is stuck or outside of the expected range, it triggers the code.
What a healthy reading looks like
Expected feedback voltage from the wastegate position sensor should be between 0.5V (closed) and 4.5V (fully open).
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 for any visible damage to the wiring and connectors leading to the wastegate position sensor. Fix any issues found before proceeding.
- 22. Using a multimeter, measure the voltage at the wastegate position sensor connector. Ensure the engine is running and observe if the voltage changes as the throttle is applied.
- 33. If the voltage is erratic or does not fall within 0.5V to 4.5V, replace the wastegate position sensor and retest.
- 44. If the sensor is good, check the turbocharger wastegate actuator for proper operation. Manually actuate it and check the feedback voltage again.
- 55. If the actuator does not move freely, replace it and retest. If all is well, check the ECM for software updates or faults.
Common causes
- Faulty wastegate position sensor
- Wiring issue in the wastegate circuit
- Faulty turbocharger wastegate actuator
- Software defect in the ECM
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but can lead to reduced power and efficiency, fix soon.
Will this code come back?
If the underlying issue isn't resolved, yes, it will come back.
Why does it pair with other SPNs?
Often related to common components in the turbo system, like emissions or boost control.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →