Engine And Engine Cooling Problems of Chevrolet Cobalt - part 1

Chevrolet Cobalt owners have reported 205 problems related to engine and engine cooling (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Chevrolet Cobalt based on all problems reported for the Cobalt.

1 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 07/23/2025

The contact’s wife owns a 2006 Chevrolet Cobalt. The contact stated there was an abnormal fuel odor inside the cabin of the vehicle. While exiting the vehicle, the contact became aware that there was an oil leak underneath the rear end of the vehicle, and the fuel odor was more evident. There were no warning lights illuminated. The vehicle was jerking while accelerating and while driving from being stationary. The vehicle was not taken to the dealer to be diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was unknown.

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2 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 07/24/2024

The car idles very low when stopped and sputters/putters like it's going to die. It has now actually died on me twice while driving, luckily when you put it in park and turn the car off and back on it starts right back up but you can see how this is a severe safety hazard. The first time it died I was stopped in the turning lane waiting on trafiic to go by so I could turn left (this is the busiest street in town) I go to start turning left the car just shuts off mid turn crossing the other lane of the street, luckily I didn't get hit by oncomig traffic and was able to coast onto the side street that I was turning on and pull over and turn the car off and back on and drive it home. I took it to the mechanic and he can't figure out what's wrong with it so he gives it a tune up and now the check engine light won't turn off. . . Fast forward to today it dies again at a stop sign with my 12 year old son in the car. It is especially bad if you have the ac on it seems like it effects the elctrical like the car is going to shut off when I am stopped and the ac is running, so I turned off the ac and it was still sputtering when I would stop but didn't die again. . Read more...

3 Engine And Engine Cooling problem of the 2007 Chevrolet Cobalt

Failure Date: 01/05/2024

Timing chain came right threw the valve cover.

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4 Engine And Engine Cooling problem of the 2009 Chevrolet Cobalt

Failure Date: 11/16/2023

My car turned off while I was driving and almost caused me to crash into an 18 wheeler. Thank god I turned on my emergency signal and the truck swerved!. I would of died. I was stuck in the middle of the road and luckily some passersby helped me push it into a commercial parking area. I tried to start it again and it wouldn't start. But, when I turn my key into the off position, my car tried starting by itself. It was scary. It was checked by a mechanic, prior to this happening, because the car was hard to start. The mechanic told me to find out if there is a recall. However, I did some research and there was a recall on the ignition switch and fuel pump. The ignition switch was faulty causing the car to turn off while moving and two people died as a result. I entered the VIN # and it didn't show any recalls.

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5 Engine And Engine Cooling problem of the 2007 Chevrolet Cobalt

Failure Date: 10/04/2023

The contact owns a 2007 Chevrolet Cobalt. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated, and the service air bag message was intermittently displayed. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure but informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 120,000.

6 Engine And Engine Cooling problem of the 2009 Chevrolet Cobalt

Failure Date: 05/15/2023

The contact owns a 2009 Chevrolet Cobalt. The contact stated that she drove the vehicle to the local store. The contact stated that when she started the vehicle leave the store, the vehicle would not start. The vehicle was towed to the contact's residence. The vehicle was diagnosed by an independent mechanic. The vehicle was diagnosed with a failed fuel level sensor circuit and a failed cam shaft position sensor. The fuel pump assemble unit need to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 153,000.

7 Engine And Engine Cooling problem of the 2010 Chevrolet Cobalt

Failure Date: 05/11/2023

My car had a fuel pump go, then within months, another. We then dealt with the same problem symptomatically, and was told it was the fuel pump sensor. Within the last few weeks, I am having all the same issues-including the car intermittently not starting, gasoline leaking from the vehicle, both noticably missing from the gauge (I. E 1/8 tank less than night prior), odor of gas in the car, stalling out while driving and trying to start it, but also now dripping gas from the car. A new issue popped up, which is the dash light coming up saying "check gas cap". This past Thursday, my car wouldn't start again, and has not started since. It's concerning that the chevy Cobalt has had recalls for the same exact problems, literally thousands of complaints that mirror mine- for every model year except the 2010. It's also interesting that they also stopped producing the Cobalt entirely in 2010 too, but considering the amount of faults and issues I've seen documented in every year model it's not a shock. I'm concerned that despite the amount of complaints that include 2010 models, they were excluded from the recall and seeing that my situation is another one that won't be covered, fixed, or made right by gm is something that doesn't make sense. I have also seen, that in 2021 an investigation was launched specifically into this exact issue with the 2010, as well. I'm carless right now, with no answers from chevy other than that it's not part of the recall, yet it's part of the problem. Something is very wrong here. It's shocking they wouldn't recall a vehicle knowing it's dripping gas, pooling gas, it's such a hazard for not only anyone driving them, but anyone driving near us or even parked near us. Please help do something! also I have videos of my car dripping, 2 days prior to it not starting, if there is somewhere I could send those as well.

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8 Engine And Engine Cooling problem of the 2005 Chevrolet Cobalt

Failure Date: 02/13/2023

Ignition switch had a previous recall, but now the ignition switch won’t turn the car on on the first 5-10 switches with any keys, or spare keys. Steering wheel shakes/wobbles when exceeding over 50mph.

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9 Engine And Engine Cooling problem of the 2007 Chevrolet Cobalt

Failure Date: 11/26/2022

The contact owns a 2007 Chevrolet Cobalt. The contact stated that on multiple occasions while driving at unknown speeds, he heard an abnormal beeping sound, and the vehicle went into limp mode. An unknown warning light was illuminated. The vehicle was not diagnosed or repaired. The dealer nor the manufacturer was notified of the failure. The failure mileage was approximately 177,000.

10 Engine And Engine Cooling problem of the 2009 Chevrolet Cobalt

Failure Date: 10/02/2022

The contact owns a 2009 Chevrolet Cobalt. The contact stated while operating the vehicle the check engine light would remain illuminated and the odor of fuel was present inside the vehicle. Upon inspection, it was discovered that the fuel had leaked from near the rear passenger-side wheel area. The contact discovered that the leak was due to a corroded and damaged fuel line. In addition, it was discovered that the fuel line connecting to the fuel filter was corroded and damaged. The vehicle was not yet repaired. The local dealer and manufacturer were not contacted regarding the failure. The failure mileage was 97,600.

11 Engine And Engine Cooling problem of the 2007 Chevrolet Cobalt

Failure Date: 07/27/2022

I was driving down the road and I used my blinker then my car shut off while driving, its turned back on in seconds then when I came to a complete stop the car shut off while on drive and it lost communication to the tcm and it was displaying messages such as “low fuel” and the rpms was at zero.

12 Engine And Engine Cooling problem of the 2008 Chevrolet Cobalt

Failure Date: 06/28/2022

Heavy fuel leak.

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13 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 01/25/2022

My power steering alert came up and immediately I start having trouble driving as the steering wheel got tight. Almost had a accident and there is other problems with my 2006 chevy Cobalt lt that have been on recall and I cannot get any help at local dealership.

14 Engine And Engine Cooling problem of the 2009 Chevrolet Cobalt

Failure Date: 01/13/2022

The contact's mother owns a 2009 Chevrolet Cobalt. The contact stated that while his mother was starting the vehicle, the passenger's side air bag made clicking sounds. Additionally, the engine would rev, and the vehicle would shake while idle. The vehicle was taken to an independent mechanic who replaced the fuel filter, spark plugs, and ignition coils; however, the failure recurred. The vehicle was not repaired. The dealer was made aware of the failure but informed the contact that there was no recall associated with the VIN. The manufacturer was not made aware of the failure. The failure mileage was 106,864.

15 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 01/01/2022

The problem that sent it to a different mechanic than the chevy dealer where it came from after a month and 900. 00 bill for 550. 00 ecm and diagnostic test they did without my permission, there labor for the test and ecm was a total of 900. 00. Plus claimed it was throwing a code for a peddle that it needed. We just put a brand new peddle and brand new throttle body on it, it was idled to high, so reason for them getting it was to get the old ecm and new throttle sinked up to reduce the idle , at the time of it leaving me it started and ran just idle to high. Throwing no codes. They got it, claim it wouldn't start so did a diagnostic claimed it needed a new peddle. I said I'm coming to get it, they didn't tell me at any time I couldn't drive it home. I left there lot and pulled about 150 feet off the side of road because it wouldn't shift. Called them , botched did no good. Called same tow truck to tow it home. Got here it was idled normal but was throwing a different codes, I turned the car off it wouldn't stop running for about 3 to 4 minutes, then it died. I had it towed to different mechanic for the ignition to be replaced. He said it was throwing a couple codes still ignition not fixed yet, and it ran for about 15 minutes after shutting off the key. At no time here or at the new place did it throw a code for a defective peddle. So now it's be gone for 2 months , new ecm , new throttle body ,new peddle, idle is fixed and car runs but won't shift. Codes its throwing is now are just needing coil on #4 checked and throttle position sensor adjusted. So far that's it. 2 months later. Still not ready for pick up.

16 Engine And Engine Cooling problem of the 2010 Chevrolet Cobalt

Failure Date: 11/12/2021

The contact owns a 2010 Chevrolet Cobalt. The contact stated that his son called and stated he detected an abnormal odor of fuel inside the vehicle. The driver looked around vehicle and noticed liquid emerging near the driver’s side rear tire. The driver stated that the vehicle was hard to start. The contact inspected vehicle and noticed the fuel lines were rusted. There were no warning lights illuminated. The vehicle was taken to an independent mechanic where two sections of rusted fuel lines were replaced. The contact called the local dealer however, the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 85,933.

17 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 07/02/2021

The contact owns a 2006 Chevrolet Cobalt. The contact stated that while driving at an undisclosed speed, the vehicle was shaking and loss motive power. The power steering became inoperable. The contact was able to restart the vehicle and the local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 126,000.

18 Engine And Engine Cooling problem of the 2008 Chevrolet Cobalt

Failure Date: 06/16/2021

The contact owns a 2008 Chevrolet Cobalt. The contact stated that while driving approximately 30-35 mph, the power steering warning light illuminated before the vehicle lost power. The contact shifted the vehicle into park and restarted the vehicle and the vehicle regained normal functionality. The failure occurred a total of 4 times. The contact had not taken the vehicle to the dealer. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 114,000.

19 Engine And Engine Cooling problem of the 2005 Chevrolet Cobalt

Failure Date: 05/15/2021

The tcm in my 5 Cobalt is not working properly I've tested and replaced everything els and had the tcm reprogrammed still getting problems aiming back to the tcm it wasn't looked at by a business.

20 Engine And Engine Cooling problem of the 2007 Chevrolet Cobalt

Failure Date: 02/10/2021

Will not start- ignition bad - relay bad.

21 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 12/02/2020

Power steering warning came on while driving on the highway an the speedometer stop working now the car won't start I have checked fuses an relays unhooked battery to reset computer nothing works.

22 Engine And Engine Cooling problem of the 2010 Chevrolet Cobalt

Failure Date: 11/24/2020

The contact owns a 2010 Chevrolet Cobalt. The contact stated that fuel was leaking from the fuel lines near the rear wheel well. There was an abnormal odor of fuel detected. There was no warning light illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure however, no further assistance was provided. The contact mentioned NHTSA action number: pe20011 (fuel system, other). The failure mileage was approximately 166,000.

23 Engine And Engine Cooling problem of the 2009 Chevrolet Cobalt

Failure Date: 11/07/2020

Fuel leak from fuel line in the rear on vehicle. Corrosion to fuel line. Leaks badly when running! long engine crank after sitting a short time. Leaves puddle of fuel under vehicle. Fuel smell all the time.

24 Engine And Engine Cooling problem of the 2008 Chevrolet Cobalt

Failure Date: 09/15/2020

I had recalls fixed in 2015. And then suddenly power steering turns on and off. Never before they touched it was there an issue. It happens here and there and stops. This year is happening every day and won't go away. My power steering turns off in middle of driving. Dash board lights go off and car starts cranking. Goes super slow . I'm scared ita going to explode. I can't drive on freeway . And now besides the lock on screen coming on my engine light stays on now . Not sure what to do with it. Car shops can't help. When I 1st had the issue I called the dealer because they fixed the recall and they said nothing could be done because they had already fixed the recall.

25 Engine And Engine Cooling problem of the 2007 Chevrolet Cobalt

Failure Date: 09/05/2020

I went to turn the car on and it wouldn't start. As I tried to take the key out of the ignition it locked itself in and have not been able to remove it. I was going to attempt the car jump but I couldn't put the car in neutral to move it to a position to get a jump because the gear shift is also locked. It is impossible to move this car as is.

26 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 08/05/2020

Before I get into all of it there has never been an accident not yet at least. I do everything I can to try an stop that from happening, (but accidents do happen) only because I know my car could kill on me so I’m extra careful. 1) after I get gas I’m my car the car won’t start right away. I have to restart it a couple times an step in the gas an rev up wasting the gas I just put in to get it to start. 2) when I stop an start to pull out of somewhere on to a main road the car will just die on me so I’m stuck pulling out in traffic trying to get my car to start again. It’s when I come to a stop an pull out it just kills on me. So I have to make sure no one else is coming an I have enough time to be able to restart it otherwise I’m worried when I pull out of anywhere or stop an go that another car will smack into me because my car just died on me in the middle of the road/ pulling out an crossing lanes. Super scary! 3) let get into the next issue so anytime I run my ac my car starts to do this jumping thing like it wants to kill on me not to mention it has killed on me with the ac on (I live in louisiana an it’s too hot not to have ac plus I have 3 kids) what’s sad is the ac works fine but if you want the car to maybe not die then turn it off an you have a better chance of it not killing off on you but not always a guarantee. So ill run it for second to try an cool down so I’m not drenched in sweat but I have no other choice to turn it off so the car doesn’t just die on me. This refers back to the 2nd problem I make sure it’s off anytime I pull out of anywhere thinking that would help it from killing on me while trying to get out of anywhere but it doesn’t but I can tell you if the ac is on when I pull out when I start to go it dies right as I’m in the middle of the road every time never fails. Mechanics have replaced parts trying to fix the issue, but it still happens I can’t keep buying/fixing things for nada, ongoing problems since buying.

27 Engine And Engine Cooling problem of the 2007 Chevrolet Cobalt

Failure Date: 08/01/2020

Tl- the contact owns a 2007 Chevrolet Cobalt. The contact stated that the daughter was unable to start the engine. The vehicle was towed to an independent mechanic who diagnosed that the timing chain had failed and damaged the engine and created a hole in the engine piston. The daughter was informed that the engine needed to be replaced. The vehicle was not yet repaired. The manufacturer and local dealer was not notified of the failure. Was not diagnosed or repaired. The manufacturer was not notified of the failure. The VIN was not available. The failure mileage was 141,000. Jft.

28 Engine And Engine Cooling problem of the 2009 Chevrolet Cobalt

Failure Date: 07/04/2020

Keep smelling fuel vapors on the rear left side of the vehicle. Checked the fuel filter and it seems to be working despite my gas mileage getting worse and worse. I've been burning a full tank of gas going less than 250 miles when I should get near 400 miles a tank.

29 Engine And Engine Cooling problem of the 2010 Chevrolet Cobalt

Failure Date: 05/03/2020

I purchased a 2010 Chevrolet Cobalt from a used car dealership in July of 2019. 3 months into having the car, as I , my mother and 6yo daughter were driving on the highway at approximately 60mph , the car started to jerk and slow down. The �engine reduced power � message came across my dash . We we're almost side swiped and rear ended. Only for the fact that a fellow motorist stopped behind me to help merge traffic to keep us from getting hit , is what kept us from being in an accident and pulling over to the shoulder. This is so dangerous and I can't imagine as a mother how losing her life, or the life of her child would have been devistating because of a manufacturer's error!.

30 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 04/07/2020

Tl-the contact owns a 2006 Chevrolet Cobalt. The contact stated while driving about 45 mph up and hill the vehicle cut off and the steering wheel locked. The abs and battery light illuminated on the dashboard. The contact stated the vehicle was jump started and the contact was able to drive to their residence. The contact stated an independent mechanic used a kill switch to drain the battery. The vehicle was not taken to a local dealer nor was the manufacturer notified of the failure. The failure mileage was unknown. Lj.

31 Engine And Engine Cooling problem of the 2010 Chevrolet Cobalt

Failure Date: 03/02/2020

Tl- the contact owns a 2010 Chevrolet Cobalt. The contact stated that after starting the vehicle the warning messages had displayed indicating to check engine, power steering off, change oil etc. And all the instrument gauges were fluctuating. The owner connected a diagnostic reader to the vehicle which indicated that the control module was faulty. The cause of the failure was not determined. The vehicle was not repaired. The local dealer and manufacturer were not notified of the failure. The failure mileage was 187,701. Jft.

32 Engine And Engine Cooling problem of the 2006 Chevrolet Cobalt

Failure Date: 11/06/2019

While driving today door locks unlock and lock again randomly. It was scary. I was driving in town. Also traction control light and engine light came on. Began running rough and lunging. I am afraid to drive my own car.

33 Engine And Engine Cooling problem of the 2010 Chevrolet Cobalt

Failure Date: 10/21/2019

Traction, engine and wheels sensor light on. Hard shifting. Car shakes when braking. Engine runs rough and skips when idling. I've had brakes replaced and spark plugs. Have had all recalls repaired.

34 Engine And Engine Cooling problem of the 2005 Chevrolet Cobalt

Failure Date: 09/10/2019

I got the car a few years ago only drove it for 5 months found out about the recall. I had to pay for the car to go nassau bahamas. They never ship it for me . They paid the ignition repairs never gave me a rental car. Then I called back a few months about a warranty say 60,000 miles or 5 year they tell another recall for the same thing. So I started checking come to find all kinda law suit on that type model. They want the car off the road. I asked them to pay out the car. Can't get a response. They open but the bahamas office closed from covid-19. Still have to wait on a response.

35 Engine And Engine Cooling problem of the 2010 Chevrolet Cobalt

Failure Date: 08/22/2019

As I was driving in the highway 70 mph car abruptly loss engine power to almost a complete stop car would not go over 10 mph car keeps having same safety problem I numerous times engine losses power while im driving I replaced 02 sensors battery and others car still have the same problem it is a recurrent problem in this car that no one seems to fix puts the driver in a very dangerous situation when you are in the high way and dangerously the car losses engine power all of the sudden.


Other Common Engine And Engine Cooling related problems of Chevrolet Cobalt


Cobalt Service Bulletins
Cobalt Safety Recalls
Cobalt Defect Investigations