DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P0125 - INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL
| Description: | Indicates the engine coolant temperature (ECT) or the cylinder heat temperature (CHT) sensor has not achieved the required temperature level to enter closed loop operating conditions within a specified amount of time after starting the engine. | ||
| Possible Causes: |
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| Diagnostic Aids: | Compare the thermostat specification to the actual engine coolant temperature using the engine temperature PID (ECT or CHT). The temperature reading should be similar when the engine is at a normal operating temperature. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Vehicles with only a cylinder head temperature (CHT) sensor | - | - | GO to DL: Cylinder Head Temperature (CHT) Sensor STEP DL21. |
| Vehicles with only an engine coolant temperature (ECT) sensor | - | - | GO to DX: Engine Coolant Temperature (ECT) Sensor STEP DX18. |
| Vehicles with both a CHT and an ECT sensor | - | - | GO to DX: Engine Coolant Temperature (ECT) Sensor STEP DX18. |