The P0125 trouble code indicates that the engine does not reach the required temperature for efficient closed-loop fuel control within a specific time frame after starting. This code typically points to issues related to the engine’s coolant temperature not reaching the necessary operating temperature.
Insufficient Coolant Temperature for Closed Loop Fuel Control
Code symptoms P0125.
1. Delayed fuel efficiency optimization.
2. Malfunction indicator light (MIL) illumination.
3. Inefficient engine performance during warm-up.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0125.
1. Faulty thermostat.
2. Defective engine coolant temperature (ECT) sensor.
3. Issues with the Engine Control Module (ECM).
Code Solutions P0125.
1. Replace the thermostat if it is malfunctioning.
2. Inspect and replace the engine coolant temperature sensor if necessary.
3. Check for any issues with the Engine Control Module (ECM) and perform necessary repairs or replacements.