08 2.2L Thermostat - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

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post #1 of 8 (permalink) Old 05-22-2017, 05:04 PM Thread Starter
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08 2.2L Thermostat

Okay so the other day my coolant indicater went --- and CEL popped on. When I got to work I checked code it was the thermostat. I replaced the thermostat and the CEL reset itself and the indicater read the temp again. Tonight on my way home from work the same thing happened! Anyone have any ideas where I should start to try and tackle this problem.

Thank you
EJ
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post #2 of 8 (permalink) Old 05-22-2017, 06:52 PM
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I've had it happen a few different times - the first time it was fixed for a good while by replacing the coolant temp sensor...the second time it happened, I solved it by replacing the thermostat.

Might be the sensor, too.

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post #3 of 8 (permalink) Old 05-23-2017, 05:30 AM Thread Starter
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Thank you. I will try replacing that today as well.
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post #4 of 8 (permalink) Old 05-23-2017, 05:51 AM
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No problem - that one is quite a bit easier than the thermostat - and a lot less messy.

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post #5 of 8 (permalink) Old 05-23-2017, 06:49 AM
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Try spray cleaning the connector first and wire brushing the tab.

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post #6 of 8 (permalink) Old 05-23-2017, 10:16 AM Thread Starter
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I already replaced the thermostat. I am starting to think maybe my water pump or radiator is clogged. Doesn't seem like my coolant is being sucked out of overflow tank
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post #7 of 8 (permalink) Old 05-23-2017, 12:07 PM
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Maybe an airlock. But you should still have a reading. Like I said try cleaning the tab on the coolant temperature sensor, if that doesn't work change the sensor.
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post #8 of 8 (permalink) Old 05-26-2017, 01:33 PM Thread Starter
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The problem ended up being an air bubble. I didn't burp the system properly. Thanks for the help everyone I really appreciate it. Is there an area in this forum where I can donate. You guys have helped me a few times in the past

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Maybe an airlock. But you should still have a reading. Like I said try cleaning the tab on the coolant temperature sensor, if that doesn't work change the sensor.
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