DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2012 Lincoln Navigator L, 2012 Lincoln Navigator, 2012 Lincoln MKZ, 2012 Lincoln MKX, and 2012 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.
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:
|
|||
| 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 . | ||