Problem with my 2001 OLDSMOBILE SILLOUETTE
3400 V6
SERVICE ENGINE
GM Computer codes = auto part store pulled code and said it was the ECT
sensor
Repair for this problem = REPLACED ECT SENSOR
Tip/donation yes
GM tech = JK
question = Service engine light on again, pulled codes and it said engine
temp too low to regulate, and temp gauge does not register. What could be
the problem? Could it be a faulty ECT sensor?
If the code you are getting is P0128, then there are two common causes
for this.

1. A bad thermostat. This would also cause the engine to not heat up
enough to get heat out of the heater vents.

2. A coolant leak causing the coolant level to be low. Or a headgasket
problem. This would cause air pockets in the system, and will cause the
code and also no heat.

Thanks and hope we helped !
GreatAutoHelp
P0128 Coolant Temperature Sensor Problem