DTC P0128: - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
DTC P0128: - COOLANT THERMOSTAT (COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATURE)
| Description: | Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. | ||
| Possible Causes: |
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| Diagnostic Aids: | Refer to THERMOSTAT MONITOR for system information. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Explorer 4.0L, Explorer Sport Trac 4.0L, Fusion 3.0L, Milan 3.0L, Mountaineer 4.0L, Mustang 4.0L, Ranger 4.0L |
- | - | GO to Pinpoint Test DX . |
| All others | - | - | GO to Pinpoint Test DL . |