Throttle Actuator Control System - Stuck Closed
Throttle actuator is stuck in the closed position causing performance issues.
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 throttle body controls how much air enters the engine. If it's stuck closed, the engine can't get enough air and won't run right, or may not start at all.
What the computer is actually seeing
The engine control module (ECM) detects that the throttle actuator isn't moving as expected when it should be open, typically when the accelerator pedal is pressed.
What a healthy reading looks like
Throttle position sensor (TPS) voltage should vary 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 or corrosion on the throttle body connectors and wiring. Are there any issues? If yes, repair and retest. If no, proceed to the next step.
- 22. Measure the voltage at the throttle position sensor (TPS). Is it within the expected range (0.5V to 4.5V)? If no, replace the TPS or repair wiring as needed. If yes, proceed to the next step.
- 33. Clear the fault codes and perform a throttle body relearn procedure if applicable. Does the code return? If yes, replace the throttle actuator. If no, monitor for reoccurrence.
Common causes
- Faulty throttle actuator
- Wiring or connector issues
- Faulty accelerator pedal position sensor
- Throttle body carbon buildup or sticking.
- ECM software issue
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, it's not safe. The vehicle may go into limp mode or not start, affecting your ability to control speed.
Will this code come back after clearing?
Yes, if the underlying issue isn't fixed, the code will likely return.
Why does this code appear when other related codes are present?
Related codes usually indicate problems with the throttle system. Fixing one may lead to another code being resolved.
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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