Question about Chevrolet Cobalt

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Cobalt 06 says car is hot but it is running within parameters changed coolant temp sensor but still reads 250 degrees

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Change the thermostat first.and go for there.feel free to ask more questions.

Posted on Jul 27, 2009

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Posted on Jan 02, 2017

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What does it mean when my oil temp gage reads high but coolant temp reads in middle on Audi a4 Quattro 2.8 v6


It means the oil is hotter than the coolant or you have a bad gauge or sender. Oil temp and coolant temp are very loosely related to each other. Coolant temp should remain within 10 degrees of thermostat temperature once warmed up. I think that has a 196 degree thermostat so the coolant should be no lower than 196 and no higher than 206, tho up to 220 is relatively normal if it's hot out and/or you're running it hard. Oil temp is loosely regulated if at all, as long as it's not above 250 sustained or 300 in short bursts you're fine. Much above that and there's a problem, but it would most likely be a bad reading. It's hard to over heat the oil unless you're on a race track.

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2001 chevy malibu coolant temp sensor isnt working stuck at cold heater is hot and cooling fans are always on


You did not change the coolant temp sw. you change the ETC which sends a signal to the cpu. It looks just like the temp sw. Look on the driver side head and I believe you will see another one there or look the engine over for another sw just like the one you changed. Not sure what size engine you are asking about.

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Temp gauge is in normal, 200 degree, range when starting. Within a few minutes of driving goes up to 250, right below orange line. No leaks found, coolant level appears fine. Any ideas?


250 DEGREES ENGINE GETTING TOO HOT.SOUND LIKE CLUTCH FAN FREEWHEEL.IF CLUTCH FAN DONT LOCK IN OR HAVE RESISTANCE TURNING BY HAND WHEN ENGINE HOT.FAN CLUTCH IS BAD.IF FAN CLUTCH OKAY COOLANT LEVEL CORRECT.I WOULD CHANGE THERMOSTAT FLUSH OUT ENGINE AND RADIATOR.IF ENGINE TEMPERATURE STILL READS 250 DEGREES OVER FLOW JUG OR RESERVOIR NOT BOILING OVER THE COOLANT TEMPERATURE SENSOR FAULTY.

Nov 05, 2010 | 2003 Chevrolet Avalanche

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What is hte proper temp on a 2008 cobalt?


Ususally the thermostat opens at 195 to 200 degrees. Coolant and pressure allow normal temps to go to 230 to 240, and much higher under heat soak condition (unit turned off). Fans kick in near that temp. So, the engine needs to be that hot to be efficient and to have emission controls shift to normal... Also the high temprature prolongs engine life by forcing moisture from the oil.

Sep 26, 2010 | 2008 Chevrolet Cobalt

3 Answers

I HAVE A 2007 CHEVY COBALT THE CHECK ENGINE LIGHT CAME ON I CHECKED THE COOLANT TEMP GAUGE THE DIGITAL GAUGE READING WAS ONLY SHOWING THREE BROKEN LINES. I CHECKED COOLANT LEVEL WHICH WAS FINE. ENGINE DID...


I had this problem with a 2007 Chevy Cobalt. I changed the coolant sensor and even though the check engine light went out I still had a reading of "---" on the coolant gauge. The problem is most likely one of three things: a low coolant level, a bad coolant sensor, or the thermostat needs to be replaced. The only other possible thing it could be is a bad BCM (Body Control Module) which in that case you would most likely be having other weird problems.

The Thermostat and the sensor are both very easy to get to and replace. Take off the engine cover by removing the oil cap and they are both to the rear of the engine on the driver's side. They are right next to each other.

Hope this helps!

Apr 14, 2010 | 2007 Chevrolet Cobalt Coupe

1 Answer

My 2003 Caravan has a hard time starting sometimes. Exspecially after it sits for a while. The Ambient Tempature sensor says its 48 degrees when its 70 degrees. Also The tempeture gauge shows that its...


if your talking about the over head temp reading that is an entirely different system.the temps you show at 178,169,173 are all below what they should be,it should have a 195 degree thermostat in that engine,where did you get those temps,if you got them from the dash you should change the temperature sending unit.
re-flashing a computer is done if Chrysler found problems in vehicles and would download the new info to the computer to correct them,

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The temperature gauge on my 2002 grand prix dose


the temperature sending unit on a 97 grand prix 3800 gt(which is also the coolant temperature sensor) is not accurate. the sending unit part of this sensor only sends info to the guage on the dash. the coolant sensor part sends info to the computer of the car. it is located under thermostat and somewhat difficult to get at. i had put a brand new one in and my temperature on my dash is all over the place---even with good thermostat and properly bled system. when i hook up a scanner to my computer, the coolant sensor is sending the computer(ecu??) what seems to be the right temp. anywhere from 194 degrees to 217 when hot. the guage however on dash go from 160 to 260 in less than 2 minutes.

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2 Answers

COBALT TEMP GAUGE READS 250 DEGREES BUT ENGINE RUNNING COOL REPLACED COOLANT TEMP SENSOR AND STILL GAUGE GOES TO 250 DEG


Probably the temp gauge itself. Most of the time it doesn't have a problem but sometimes they do go bad. Did the car ever overheat prior to changing the solenoid?

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1 Answer

97 jeep cherokee electric fan problem


sound like coolant temperature sensor is open or not working.scan it to see when engine get operating temperature when coolant temperature get 190 degrees the coolant temp sensor should show 190 degrees if it shows 80 degrees or lower it not working replace it.the coolant sensor control coolant fan.when it gets hot it resistance changes or lower.the pcm grounds it .then cooling fans will run.

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