Throttle Actuator A Control Motor Circuit Low

What it means

The engine computer has detected lower than expected voltage in the throttle motor circuit. This is usually caused by a weak supply, a short to ground or an open in the circuit, and the engine enters limp mode with reduced power.

Related codes: P2100P2103P2101P0562P2106

Symptoms4

• Check engine light on, sometimes with the electronic throttle warning light.
• Severe loss of power and limited accelerator response.
• Fixed, slightly high idle.
• Occasional stalling.

Possible causes6

• Blown fuse or failed throttle control relay on vehicles that use one.
• Low battery voltage, corroded terminals or a poor ground.
• Throttle motor wiring shorted to ground or open.
• Corroded or loose throttle body connector.
• Failed motor inside the throttle body.
• Engine computer (ECU) fault, which is rare.

How to diagnose5

1. Read all stored codes; P0562 alongside it points to low system voltage overall.
2. Check the battery, its terminals, the charging system and ground points.
3. Check the throttle fuse and relay if the vehicle uses them.
4. Unplug the connector and check the wiring for shorts to ground or opens.
5. Measure the throttle motor resistance and compare it with the manufacturer specification.

How to fix5

1. Clean the battery terminals and ground points, or replace a weak battery.
2. Replace the faulty fuse or relay after finding why the fuse blew.
3. Repair the shorted or broken wire.
4. Replace the throttle body if its motor has failed, then perform the relearn.
5. Clear the codes and confirm the code does not return.

The cost is low for a fuse, relay or battery terminals, and reaches the upper end when the 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