P2123 code indicates a high voltage condition in the throttle or pedal position sensor or switch “D” circuit, signaling a potential issue with the throttle control system.
P2123 Throttle/Pedal Position Sensor/Switch “D” Circuit High
Code symptoms P2123.
1. Sudden loss of power while driving
2. Engine stalling or hesitation during acceleration
3. Difficulty maintaining a constant speed
4. Illumination of the check engine light
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P2123.
1. Faulty throttle position sensor
2. Wiring or connector issues in the throttle position sensor circuit
3. Corrosion or poor connections in the sensor circuit
4. Engine control module (ECM) malfunction
5. Mechanical issues in the throttle pedal or throttle body
Code Solutions P2123.
1. Check the throttle or pedal position sensor for any physical damage or wear. Replace the sensor if necessary.
2. Inspect the wiring harness connected to the throttle or pedal position sensor for any signs of damage or loose connections. Repair or replace any damaged wires.
3. Reset the vehicle’s ECU by disconnecting the battery for several minutes, then reconnecting it. This may clear the error code if it was triggered falsely.
4. Perform a throttle relearn procedure using a compatible OBD scanner to recalibrate the throttle position sensor.
5. If the issue persists, consider seeking professional help from a certified mechanic to diagnose and repair any underlying problems with the throttle or pedal position sensor circuit.