Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
If cooling system is not leaking and the fluid level is OK, replacing the thermostat usually takes care of the problem.
Indicates that the Thermostat Monitor has not achieved the required engine operating temperature level within a specified amount of time after starting the engine.
To diagnose the P0128 1997 Ford F150 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.
Coolant thermostat (coolant temperature below thermostat regulating temperature). Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine.
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