Throttle Actuator A Control Throttle Body Range/Performance

What it means

The engine computer has found that the throttle plate does not reach the commanded position or does not return to its normal rest position when power is removed. This usually points to a mechanical problem in the throttle body, such as carbon or a weak spring, and the engine enters limp mode.

Related codes: P2101P2111P2112P2176P0121

Symptoms4

• Check engine light on, sometimes with the electronic throttle warning light.
• High, low or unstable idle.
• Loss of power and limp mode.
• Occasional stalling at a stop.

Possible causes5

• Carbon buildup around the plate preventing it from reaching its rest position.
• Weak return spring or worn gears inside the throttle body.
• Faulty throttle position sensor built into the throttle body.
• Relearn not done after cleaning the throttle body or disconnecting the battery.
• Air leak after the throttle changing the idle airflow.

How to diagnose5

1. Inspect the throttle plate with the engine off for carbon or stiff movement.
2. Watch commanded and actual throttle position on a scan tool and compare them.
3. Check the throttle rest position reading with the key on and compare it with the manufacturer specification.
4. Inspect vacuum hoses for air leaks.
5. Check any accompanying throttle sensor or motor codes.

How to fix5

1. Clean the throttle body with a dedicated cleaner.
2. Perform the throttle relearn with a scan tool or per the manufacturer method.
3. Repair any air leak after the throttle.
4. Replace the throttle body if the spring, gears or built-in sensor are damaged.
5. Clear the codes and confirm a stable idle and that the code does not return.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

A cleaning and relearn are often enough at low cost; the cost rises when the complete throttle body is replaced.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions