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post #1 of 32 (permalink) Old 10-15-2011, 05:22 PM Thread Starter
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Cobalt Total Shut-Down While Driving

I have a 2007 chev. Cobalt and recently while [email protected] highway speed the vehicle totally shut down (motor, lights, radio, anything electronic)about 5 min later I was able to restart the engine with all electronics restored. I took it a dealer they told that the problem was caused by a malfunction of the Mass Airflow Sensor.I understand that a malfunction of the Mass Airflow Sensor could cause a car to stall. However the Question I have and not been able to get answer from GM, is:
****Will a Malfunction of the Mass Airflow Sensor cause a Total Shut Down of all the Vehicles Electrical Systems?
I am concerned that this vehicle may still have a problem.
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post #2 of 32 (permalink) Old 10-15-2011, 05:51 PM
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Sounds like ignition switch
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post #3 of 32 (permalink) Old 10-17-2011, 06:43 AM
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Bigdd2007,

Iím sorry to hear about your car shutting down on you on the highway Ė but Iím glad youíre okay!

In regards to your question about the Mass Airflow Sensor, Iím looking into it for you and will post again when I have an answer (should be within the next couple of days Ė our experts are busy folks!).

Thanks for your patience, and if thereís anything I can do in the meantime, donít hesitate to PM me (Iíd need first/last name, VIN, etc so I can access your information).

Sarah
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post #4 of 32 (permalink) Old 10-17-2011, 07:39 AM
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I know a MAF/MAP/TMAP can cause the car to throw into limp mode, but I still retained full electronics. Are the battery cables tight?


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post #5 of 32 (permalink) Old 10-17-2011, 10:49 AM Thread Starter
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We have had the car checked Out at a GM dealer,all the electric wiring is Ok and the Battery cables are tight. The dealer says nothing else is wrong wth the car( only a malfunctioning Mass air flow Sensor) but they have not yet explained why we lost all electronics @ highway speed . ANYONE ELSE HAD THIS PROBLEM???
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post #6 of 32 (permalink) Old 10-17-2011, 02:09 PM
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The maf should not affect the function of ANY electronics. I had a short circuit in the wirin of an O2 sensor and it kept blowing the fuse that is connected to the circuit for the MAF, Evap solenoid and both O2 sensors and the car would start then die immediately but all electronics worked fine. You may have a short in your electrical system somewhere else that caused this issue. Good luck.

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post #7 of 32 (permalink) Old 10-18-2011, 07:38 AM
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Hello again Bigdd2007 –

I heard back from our technical assistance center and their response to your question was: “Generally no, this should not cause total electrical system failure. To verify what the actual concern is we recommend that the customer take vehicle to a General Motors dealership or a qualified service center”

I realize you’ve been into your dealership already. Keep being active on this. If you would like Customer Assistance to help you work with your dealer towards getting this concern resolved, please private message me with your first/last name, VIN, and phone number. From there, I’ll set up a case and get things moving on my end.

Best,
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post #8 of 32 (permalink) Old 10-18-2011, 02:12 PM
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Have them check for corrosion on contacts of the big fuse in the trunk. Might have gotten wet from road grim after a flat tire change, snow shovel thrown in the trunk or a leaky third brake light seal at the trunk.
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post #9 of 32 (permalink) Old 10-20-2011, 12:15 PM Thread Starter
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We have done all the suggestions. We have been to a GM Dealer Twice. My biggest concern is that this car may not be safe to Drive and here is Why: When the "TOTAL" Shut down Happen we were rounding a left hand curve,we were Lucky and Managed to grind the car to stop without sliding off the road. After sitting in total darkness for a few minutes ( without any electric at all) the car started and acted if there was never a problem. The next day we took it to a GM dealer all they said was the Mass Air flow sensor was bad after repair they said the car was safe to drive. When questioned about the total electric failure all they replied is the sensor caused problem and there was no electric wire damage. It seems to to me that if this sensor can cause such a "MASSIVE FAILURE" of all electric systems required to bring the car safely to a halt, this car may have a major problem. I just hope it does not take some getting injured or killed before this issue is dealt with.
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post #10 of 32 (permalink) Old 10-20-2011, 12:43 PM
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Have you tried going into an empty parking lot and doing a sharp lefthand turn just to see what would happen.
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