P2104 code: Throttle actuator control system forces idle speed in a vehicle.
P2104 Throttle Actuator Control System – Forced Idle
Code symptoms P2104.
– Reduced engine power
– Illuminated check engine light
– Poor acceleration
– Rough idle
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P2104.
1. Throttle actuator motor malfunction
2. Throttle position sensor failure
3. Wiring or connector issues in the throttle actuator control system
4. Electronic control unit (ECU) software malfunction
5. Mechanical binding in the throttle body
Code Solutions P2104.
1. Inspect the throttle body for any signs of dirt, debris, or carbon buildup. Clean the throttle body thoroughly to ensure proper functionality.
2. Check the wiring harness and connectors related to the throttle actuator control system. Look for any loose connections, frayed wires, or corrosion. Repair or replace any damaged components as needed.
3. Perform a throttle body relearn procedure using a scan tool to reset the system and recalibrate the throttle position sensor. This can help resolve any issues causing the forced idle condition.
4. Verify that the throttle actuator motor is functioning correctly by testing its operation with a scan tool. Replace the throttle actuator if it is found to be faulty or not responding as expected.
5. Reset the vehicle’s ECM (Engine Control Module) by disconnecting the battery for a few minutes and then reconnecting it. This can sometimes clear any stored error codes and reset the throttle actuator control system.