DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0128 - COOLANT THERMOSTAT (COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATURE)
| Description: Indicates 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 |
| Fiesta, Focus |
GO to PINPOINT TEST DX . | ||
| All others | GO to PINPOINT TEST DL . | ||