Turbocharger Wastegate Control Position Actuator
This code indicates a problem with the wastegate control actuator position.
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 wastegate actuator controls how much exhaust goes to the turbo. If it's not working right, the engine could produce too much boost or not enough, affecting power and efficiency.
What the computer is actually seeing
The ECM monitors the position of the wastegate actuator based on the desired boost pressure and the actual boost pressure readings. If the position is out of range, it sets this code.
What a healthy reading looks like
An expected voltage of 0.5 to 4.5 volts at the actuator position sensor according to throttle position.
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 to the wastegate actuator for damage or corrosion. Fix any issues found. Decision: Was wiring intact? Yes - go to step 2, No - repair wiring and retest.
Common causes
- Faulty wastegate actuator
- Wiring issue or short in the actuator circuit
- Faulty ECM or calibration issue
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It may be drivable, but performance could be compromised. Fix it soon to avoid further issues.
Will this code come back after resetting?
If the underlying problem isn't fixed, it likely will return.
Why does this code pair with SPN 1188?
Both relate to wastegate functionality—often when one fails, the other does too.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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