P0125 -Insufficient Coolant Temperature For Closed Loop Fuel Control
Indicates the ECT
sensor has not achieved the required temperature level to enter closed loop operating conditions within a specified amount of time after starting engine.
● ● Insufficient warm up
● Low engine coolant level
● Leaking or stuck open thermostat
● Malfunctioning ECT sensor
Compare ECT PID to
thermostat specification when vehicle is at operating temperature. Temperature readings should be similar.