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post #1 of 3 (permalink) Old 02-18-2019, 06:47 PM Thread Starter
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Left Front Knocking when Hitting a Bump

So my daughter has had this problem for awhile. She is driving down the road and hits one of those nipples in the road. Every time she hits one, her left front side of the car starts making a knocking noise. On Friday, she got a "Service Traction" light on her car and is now throwing a P0013, P0014 and P0203 code. Not sure if all of this is connected. She drives a 2009 Chevrolet Cobalt and it only has 50,000 miles on it. Any help would be greatly appreciated.
Thanks
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post #2 of 3 (permalink) Old 02-27-2019, 06:42 PM
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a little late but the p0013 and p0014 most likely needs a new exhaust solenoid valve and the p0203 is for injector 3 circuit open so check for a broken wire for the injector
probably just happened by chance but the knock noise could either be a link,strut and or mount, control arm bushings
service trac light will come on is there is a ses light that is severe enough so it probably popped on because of the p0203 dtc causing a misfire
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post #3 of 3 (permalink) Old 04-03-2019, 10:02 PM
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Hope you found the problem. If not I had 2 issues with my 09. 1stwas the wheel covers. I use a foam weather strip to quite them. The other was broken mounts for plastic air deflector. These are located just forward of each wheel where the side panel attaches. There are about 3 or 4 plastic screws that hold it in place.
Good luck

Tom
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