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| CEL & O2 sensors http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=1&t=39600 |
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| Author: | lionseye640 [ Mon Jan 26, 2009 10:55 am ] |
| Post subject: | CEL & O2 sensors |
The check engine light came on in the Jeep the other day. I took it to the shop to get the codes read and was told that all 4 O2 sensors were testing bad. Extended warranty covered all parts/labor, but I guess I'm wondering if anyone has ever heard of all 4 sensors going bad at the same time. The tried telling me it's because they get wet repeatedly when driving through flooded streets, etc. For some reason, I think there's more to what's going on with the KJ. 2005 Sport 4 wheel drive, almost 39,000 miles on it, running Heet when the temps are below 20 degrees (I had an old car that used to freeze up all the time, which started the habit of adding Heet). Is it possible the Heet is doing something to the KJ? Or are there any other reasons for this? |
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| Author: | tjkj2002 [ Mon Jan 26, 2009 1:15 pm ] |
| Post subject: | |
The Heat is what killed your O2 sensors and your cats will fail soon also.The biggest cause for bad O2 sensors is they are not really bad but the heater circuit starts failing and you get codes for poor O2 sensor performance. |
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| Author: | lionseye640 [ Mon Jan 26, 2009 1:33 pm ] |
| Post subject: | |
So if I stop running Heet now - will my cats still fail, or is it possible that I can avoid this happening? |
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| Author: | JJsTJ [ Mon Jan 26, 2009 2:04 pm ] |
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I have been getting O2 sensor heater codes too. Now I have to get another set lengthened for my setup since i have my 1st smog check due in a few weeks. Ugh. |
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| Author: | tjkj2002 [ Mon Jan 26, 2009 5:58 pm ] |
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lionseye640 wrote: So if I stop running Heet now - will my cats still fail, or is it possible that I can avoid this happening? I maybe to late.Has your MPG's and power been lagging lately?
Stuff like Heat and those injector cleaners should not be used often,maybe once every 6 months at max.They are "cat" safe and "O2 sensor" safe but will harm them if used in every tankfull. |
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| Author: | lionseye640 [ Mon Jan 26, 2009 6:05 pm ] |
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MPG hasn't really dropped, but power has been a little less than enthusiastic. I was hoping that the power drop was due to me adding a thicker engine skid and the hi-lift. Maybe I'm SOL thoughv  Anyone know if the cat's covered under an extended warranty?
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| Author: | tjkj2002 [ Mon Jan 26, 2009 6:06 pm ] |
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lionseye640 wrote: MPG hasn't really dropped, but power has been a little less than enthusiastic. I was hoping that the power drop was due to me adding a thicker engine skid and the hi-lift. Maybe I'm SOL thoughv They are covered under a 8year/80,000miles federal warranty.
Anyone know if the cat's covered under an extended warranty? |
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| Author: | tommudd [ Mon Jan 26, 2009 6:19 pm ] |
| Post subject: | |
I would not mention using the HEET when you take it in, 
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