Throttle Actuator A Control Motor Circuit High

What it means

The engine computer has detected higher than expected voltage or current in the throttle motor circuit. This usually points to wiring shorted to a voltage source or an internal short in the throttle motor itself, and the engine enters limp mode.

Related codes: P2100P2102P2101P0563P2106

Symptoms4

• Check engine light on, sometimes with the electronic throttle warning light.
• Loss of power and limp mode.
• Limited or no response to the accelerator.
• Fixed idle speed.

Possible causes5

• Internal short in the throttle body motor.
• Throttle motor wiring shorted to another power wire.
• Water or corrosion in the connector bridging the pins.
• High charging system voltage from a faulty alternator.
• Engine computer (ECU) fault, which is rare.

How to diagnose5

1. Read all stored codes; P0563 alongside it points to high system voltage.
2. Measure charging voltage with the engine running and confirm it is within specification.
3. Inspect the connector for moisture, corrosion or touching pins.
4. Measure the throttle motor resistance; a value far below specification indicates an internal short.
5. Check the wiring for a short to a voltage source.

How to fix5

1. Dry and clean the connector, or replace it if corroded.
2. Repair the shorted wire and separate it from the voltage source.
3. Repair the charging system if voltage is high.
4. Replace the throttle body if its motor is internally shorted, then perform the relearn.
5. Clear the codes and confirm the code does not return.

Repair cost

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

The cost is low for a connector or wiring repair, and rises when the throttle body or alternator must be 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