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  #11  
Old 03-12-2012, 08:19 PM
jjshemi jjshemi is offline
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and is that the left side ofthe truck or right?
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  #12  
Old 03-13-2012, 01:57 AM
jjshemi jjshemi is offline
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did your truck throw only p0300 for code or did it actually throw an o2 sensor code also?..
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  #13  
Old 03-14-2012, 07:34 PM
jjshemi jjshemi is offline
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2 new upstream o2 sensors.. seems like problem is gone... but need to drive more to make sure.. thanks for the help guys..
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  #14  
Old 05-05-2012, 08:28 PM
rupert204 rupert204 is offline
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id check and see if you can locate which cylinder is misfiring and switch over the coil pack to another cylinder and if it changes your misfiring cylinder to the one you switched it to it's probably a dead coil pack i just diagnosed this problem on a 2005 envoy and this is a simple test that doesn't take long or alot of effort to see and could possibly save you some time and money in the long run.
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Old 10-13-2012, 01:08 AM
Tuff Mutt Tuff Mutt is offline
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I'm having the same exact problem right now.I've elimated the plugs and wires.I'm fairly certain it's not a valve problem.I don't smell rotten eggs so I feel pretty good about the cat conv. too.I'm feeling like its a half shot sensor but which one I don't know.
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  #16  
Old 10-18-2012, 04:45 PM
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dsullivan22 dsullivan22 is offline
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I am having this problem as well! I am going to look at the sensors at rockauto and try to replace them myself I think. Probably changing all of them just to be sure.
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  #17  
Old 10-21-2012, 05:23 PM
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Timbo114 Timbo114 is offline
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Change your drivrs side Bank 1 O2 sensor click link
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  #18  
Old 10-26-2013, 11:45 AM
jessejames3081 jessejames3081 is offline
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I've got a 05 Hemi in my truck and had a small miss, replaced all spark plugs and drove a little better, a couple days later pulling out of my drive way it started missing terrible, popping under the hood and extreme loss of power, check engine light came on with the P0300 code, replaced all the plug wires and ran great for a few days, leaving my house again and same sanareio, popping and loss of power, but I noticed that if I shut the truck off and start it back, it runs fine again for a few days. Any ideas?
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