2017-10-10
Engine runs rough, missing or stumbling
Smoke coming from the tail pipe
Inoperative cruise control
The vehicle may enter limp mode
Disconnected plug to the Engine
Coolant Temperature (ECT) sensor
Possible corrosion in the ECT sensor connector
Damage to the ECT sensor wiring to the ECM
Defective ECT sensor
The engine is low on coolant or has coolant leaks
The engine coolant thermostat is not opening at the proper temperature
The ECM is damaged
Engine Coolant Temperature Sensor: The coolant temperature sensor measures the temperature of the engine coolant. Problems lead to engine overheating
Start the vehicle (make sure the heater is off) and watch the Coolant Temperature values change. If the Coolant Temperature readings will not go above the 160 170 F mark within fifteen minutes, the thermostat is the most likely culprit.