How do you fix a p0125 obd code?

The P0125 OBD code indicates that the engine is not reaching the required operating temperature for efficient emissions control. To fix it, first check the coolant level and thermostat to ensure they are functioning properly, as a stuck-open thermostat can prevent the engine from warming up. Additionally, inspect the coolant temperature sensor for faults and verify that the engine is not leaking coolant. If these components are in good condition, further diagnostics on the engine's cooling system and electronic controls may be necessary.