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2009 Chevrolet Cobalt LT 2.2L - 140,000km

Hi all,

I recently had the check engine light come on my cobalt. I scanned the code and got P0011. During the day, before my check engine light came on, my car would have a rough idle and jerk me forwards. Currently it sounds like I have an exhaust leak.

I have done an oil change about 2000km ago. I checked the dip stick and the oil level is good. Oil life is at 86%. Oil colour is good.

Any ideas how to diagnose the problem? I cleared the code and the light hasn’t come back on in 2 days but the harsh noise still there. Wondering if there’s anything I can check in regards to the code P0011 or the rough idle.
Thanks in advance.
 
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