Can a stuck thermostat set off a check engine light?
So yes it is possible that the thermostat can be the root cause of your problems but they can also be completely separate. Code 1220 can be caused by the oxygen sensor itself, improper signal to the oxygen sensor from the engine control unit, a vacuum leak, or even a sticking or worn idle control valve.
Why does my check engine light keep coming on?
If the check engine light is coming on and a code like P1217 is in the computer then the computer is seeing an overheat conditions from the coolant sensor telling it your engine is overheating. This can be caused by a defective coolant sensor, radiator partly clogged, fans not working, thermostat or internal engine head problems.
What are the symptoms of a bad thermostat?
1 Overheating. The most common symptom of a bad thermostat is overheating. 2 Blown Head Gasket. If your Cruze runs too long without coolant circulating through the engine, the head gasket can blow. 3 No Heat. 4 Warning Light or Temp Gauge Spiked. 5 Coolant Leak Around the Thermostat. …
Can a bad thermostat cause coolant to leak?
Another indication may be leaking coolant, which can occur when the thermostat does not allow coolant to flow when stuck in the closed position. It can eventually cause other coolant hoses to leak as well, often resulting in coolant leaking on the ground under your vehicle.
So yes it is possible that the thermostat can be the root cause of your problems but they can also be completely separate. Code 1220 can be caused by the oxygen sensor itself, improper signal to the oxygen sensor from the engine control unit, a vacuum leak, or even a sticking or worn idle control valve.
If the check engine light is coming on and a code like P1217 is in the computer then the computer is seeing an overheat conditions from the coolant sensor telling it your engine is overheating. This can be caused by a defective coolant sensor, radiator partly clogged, fans not working, thermostat or internal engine head problems.
1 Overheating. The most common symptom of a bad thermostat is overheating. 2 Blown Head Gasket. If your Cruze runs too long without coolant circulating through the engine, the head gasket can blow. 3 No Heat. 4 Warning Light or Temp Gauge Spiked. 5 Coolant Leak Around the Thermostat.
Another indication may be leaking coolant, which can occur when the thermostat does not allow coolant to flow when stuck in the closed position. It can eventually cause other coolant hoses to leak as well, often resulting in coolant leaking on the ground under your vehicle.