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P1133/p1153

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Old 01-07-2005, 12:57 PM   #1
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I have these codes(Insufficient switching for the passenger and drvierside front o2 sensors) for about 7 months now. I did a search on this and found out it may be caused by the sensors not getting hot enough to function properly. I doubt my o2 sensors are out at 30k miles. When these codes appeard my truck only 24k miles. I am sure there are not leaks in my exhaust that could be causing this.
I am not sure if this coincidense but I notice these code popping up after putting some silicone between the header gaskets and the headers . Could this be the cause of my codes not going away? Other than this, my truck has no other issues and it's running very strong. Anybody ever esperince these codes in their trucks? BTW, this is on my signle cab 5.3.
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Old 01-07-2005, 01:09 PM   #2
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Headers? Are they coated? What headers if you do have headers?
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Old 01-07-2005, 01:12 PM   #3
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Tib, I don't remember exactly where I read it, but someone did say that RTV sealer could flake/break off and cause this code. I did a search for P1154, which is the same code for the other O2 sensor, and found that particular information. I'm getting the P1154 after having my headers/cats installed with new O2 sensors.

Hope that helps!
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Old 01-07-2005, 01:17 PM   #4
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Headers? Are they coated? What headers if you do have headers?
Yes, I do have some long tube ceramic coated ASM headers.
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Old 01-08-2005, 06:09 AM   #5
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Its the RTV. I also read that somewhere. It will **** up the O2's.
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Old 09-18-2009, 05:17 PM   #6
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bumping this old thread. i'm getting the p1133 codes. i have longtubes and ory and i used copper rtv in the pipes to try to fix some leaks. is this what is probably causing the code? if it is are the o2's now garbage? will this happen again with new o2's if i replace them?
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Old 09-20-2009, 01:39 PM   #7
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bumping this old thread. i'm getting the p1133 codes. i have longtubes and ory and i used copper rtv in the pipes to try to fix some leaks. is this what is probably causing the code? if it is are the o2's now garbage? will this happen again with new o2's if i replace them?
I really doubt your 02's are bad.. Have your tuner check if your 02's are switching... If they are, they are just taking longer to heat up and start switching because of the lt headers and it's during this time your p1133 is activated... If this is the case, have your tuner desable SES light for this particular code and don't warry about it..
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Old 09-21-2009, 11:21 PM   #8
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I really doubt your 02's are bad.. Have your tuner check if your 02's are switching... If they are, they are just taking longer to heat up and start switching because of the lt headers and it's during this time your p1133 is activated... If this is the case, have your tuner desable SES light for this particular code and don't warry about it..
why don't you think they are bad? i thought they went out around my mileage?
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Old 09-23-2009, 01:00 AM   #9
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now the truck is running like crap at idle. rpms are bouncing from 5 to 700ish. sign of the o2's?
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Old 09-23-2009, 12:25 PM   #10
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now the truck is running like crap at idle. rpms are bouncing from 5 to 700ish. sign of the o2's?
It could be a sign of a couple of things, but since you're getting the O2 codes I'll bet that they're related. Best bet is to get a scan tool or some tuning software hooked up and watch the O2 sensor activity. Your sensors could be contaminated by the RTV, or it may be a problem with the headers releasing too much heat for the O2's to get warm enough to function properly.
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