2001 Chevy Cavalier Coupe
2.2 4cyl.
Check Engine Light
codes P0128
Repair done prior = A year ago hired a mechanic to supposedly change
thermostat due to overheating engine.
Done to repair = Went to Autozone and got the code P0128. Sales
associate suggested i change the thermostat so i purchased one and
"replaced" it today. Also just found out today that the mechanic hired last
year to replace old thermostat never put in a new one. No wonder during
the winter months i had no heat...
Question = My check engine light came on about 1 week ago. I brought it
to AutoZone and they gave me a Code P0128. Probable causes:
Check Coolant Level - checked and ok
Thermostat Defective - put a new one in today
ECT Sensor Defective - No replacement part available at AutoZone.
After placing the new thermostat in place and filling the reservoir
with fresh antifreeze (50/50 Dexcool), I turned on the ignition and then
noticed the engine temperature gauge raised up too fast just past the
halfway point in a matter of minutes. Check engine light still on.
JK:
It is possible the sensor is bad, or you have air in the cooling system. This code
normally comes on because the engine coolant temp has not reached normal
operating temp within a per-determined time. Air pockets around the sensor will
cause it to not read properly.
Suggest replacing the sensor and bleeding the system.
2.2 4cyl.
Check Engine Light
codes P0128
Repair done prior = A year ago hired a mechanic to supposedly change
thermostat due to overheating engine.
Done to repair = Went to Autozone and got the code P0128. Sales
associate suggested i change the thermostat so i purchased one and
"replaced" it today. Also just found out today that the mechanic hired last
year to replace old thermostat never put in a new one. No wonder during
the winter months i had no heat...
Question = My check engine light came on about 1 week ago. I brought it
to AutoZone and they gave me a Code P0128. Probable causes:
Check Coolant Level - checked and ok
Thermostat Defective - put a new one in today
ECT Sensor Defective - No replacement part available at AutoZone.
After placing the new thermostat in place and filling the reservoir
with fresh antifreeze (50/50 Dexcool), I turned on the ignition and then
noticed the engine temperature gauge raised up too fast just past the
halfway point in a matter of minutes. Check engine light still on.
JK:
It is possible the sensor is bad, or you have air in the cooling system. This code
normally comes on because the engine coolant temp has not reached normal
operating temp within a per-determined time. Air pockets around the sensor will
cause it to not read properly.
Suggest replacing the sensor and bleeding the system.
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| 1-2-11 what about replacing the thermostat? That is a quick and easy repair. |
Comments
2001 Chevy Impala coolant fan keeps running after the engine is off. The temperature gauge
quit working at the same time. Any suggestions? Thanks,Candy
Answer: if you are referring to the radiator fan, it sounds like you are describing a pretty
common problem. I'll bet the check engine light is on also. If it is then you probably have a
trouble codes stored – P0128. This code is described as "coolant temperature below thermostat
threshold". Basically the thermostat is stuck open and the engine is not getting to operating
temperature. That's why the gauge looks like it quit working but is just showing cold coolant
temperature. The fan staying on is the computer going into sort of a safe mode. Since it does
not know what temperature the coolant is, it turns the fan on in case it's too hot, to prevent the
engine from overheating. Get the thermostat replaced, the code cleared, and you will be good
to go. This is assuming that your antifreeze is not low. If it were low you have the same problems
as above. So check that first.
quit working at the same time. Any suggestions? Thanks,Candy
Answer: if you are referring to the radiator fan, it sounds like you are describing a pretty
common problem. I'll bet the check engine light is on also. If it is then you probably have a
trouble codes stored – P0128. This code is described as "coolant temperature below thermostat
threshold". Basically the thermostat is stuck open and the engine is not getting to operating
temperature. That's why the gauge looks like it quit working but is just showing cold coolant
temperature. The fan staying on is the computer going into sort of a safe mode. Since it does
not know what temperature the coolant is, it turns the fan on in case it's too hot, to prevent the
engine from overheating. Get the thermostat replaced, the code cleared, and you will be good
to go. This is assuming that your antifreeze is not low. If it were low you have the same problems
as above. So check that first.
| 10-14-11 Check your fuses too |
| 1-6-12 I was at my wits end because of my 2.2 cavalier overheating.I tried everything short of a water pump and head gasket but then read on a forum to move the thermostat back to the upper part of engine like on the older cavaliers.I put a gasket in the lower housing and on the upper I cut off the cone inside the housing and filled it flat installed my thermostat and gasket refilled coolant and have never had another problem. |
