Throttle Actuator Control System - Forced Limit
The throttle actuator isn't functioning properly and is stuck in a forced limit condition.
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)
Inside your engine's control system, there's a throttle actuator that controls how much air enters the engine. If the actuator gets stuck or doesn't respond as it should, the computer limits engine power to prevent damage, treating it like a safety valve.
What the computer is actually seeing
The powertrain control module (PCM) monitors the throttle position sensor and the throttle actuator position. If the throttle position remains at a limit for longer than about 2 seconds while the accelerator pedal is moved, this code gets set.
What a healthy reading looks like
Expected throttle position voltage should be between 0.5V (closed) and 4.5V (wide 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.
- 1Inspect wiring and connectors to the throttle actuator for damage or corrosion. Are they good? (YES = Next Step, NO = Repair/replace affected wiring)
- 2Check throttle position sensor voltage; is it reading between 0.5V and 4.5V? (YES = Next Step, NO = Replace throttle position sensor)
- 3With the engine on, manually actuate the throttle plate. Does it move freely? (YES = Replace throttle actuator, NO = Clean or replace throttle body)
- 4Clear the code and retest the throttle operation. Does the code return? (YES = Recommendation for PCM reprogramming, NO = Repair successful)
Common causes
- Bad throttle position sensor
- Faulty throttle actuator
- Wiring issues between the throttle actuator and the PCM
- Mechanical binding in throttle body
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive as you may experience reduced power and acceleration.
Will this problem come back after being cleared?
If the underlying issue isn't fixed, the code will likely return.
Why does this code pair with other throttle control codes?
These codes often stem from similar root causes in the throttle control system.
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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