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O2 Problem??? NEED SOME HELP!!!!!

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Old 12-28-2008, 10:41 PM
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I reset everything this morning. I put about 150 miles on it today. Now I am just having codes P0101, P0154, and P0155.
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Old 12-28-2008, 10:44 PM
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How does it drive?
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Old 12-28-2008, 10:52 PM
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Originally Posted by GMCtrk
How does it drive?
When you are wide open, you can tell that it isn't 100%. Then it will all of a sudden have power for about 1/2 a second then bog back down again. I am also getting horrible gas mileage.
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Old 12-28-2008, 11:02 PM
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Did you get a computer on there and check the A/F ratio?

Was the stock pcm changed for a different one when it was tuned or did the tuner tune your stock pcm?
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Old 12-28-2008, 11:08 PM
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did you unplug or plug in any of the conections while the Key was on??? That can cause a voltage spike and damage the components... Have you put another sensor on it???

Yes you can check the voltage and the resistance on the sensors, but I dont have any of that info in front of me right now...
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Old 12-29-2008, 11:09 AM
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Originally Posted by GMCtrk
Did you get a computer on there and check the A/F ratio?

Was the stock pcm changed for a different one when it was tuned or did the tuner tune your stock pcm?
No. I just took it out and met him at my buddy's shop. He did everything there.
Originally Posted by 1FastBrick
did you unplug or plug in any of the conections while the Key was on??? That can cause a voltage spike and damage the components... Have you put another sensor on it???

Yes you can check the voltage and the resistance on the sensors, but I dont have any of that info in front of me right now...
No I did not unplug anything while the truck was on. I disconnected the ground, then installed the headers, then plugged everything back up, then reconnected the ground. And yes, it has brand new sensors on it now. I was getting P0134, P0135, P0154, P0155. After I put new ones on I am only getting P0154, and P0155.

I am going to check voltage and resistance later tonight. I wish I had a service manual to tell me what it is all supposed to read.
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Old 12-29-2008, 11:10 AM
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Originally Posted by Jtbrewer19
I am going to check voltage and resistance later tonight. I wish I had a service manual to tell me what it is all supposed to read.
Does anyone have this info???
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Old 12-29-2008, 06:04 PM
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I just hooked it up to a GM diagnostic reader. After warming the truck up, Bank 1 sensor 1 is only reading 35 at idle. Bank 2 sensor 1 is reading a little over 400 and appears to be working properly on screen. MAF was reading -27 degrees. So does anyone think that the MAF could be the problem?
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Old 12-29-2008, 06:05 PM
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I just really want to get this figured out. I am really looking forward to installing the cam and converter. I just want to get this out of the way first.
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Old 12-29-2008, 11:59 PM
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Originally Posted by Jtbrewer19
I just hooked it up to a GM diagnostic reader. After warming the truck up, Bank 1 sensor 1 is only reading 35 at idle. Bank 2 sensor 1 is reading a little over 400 and appears to be working properly on screen. MAF was reading -27 degrees. So does anyone think that the MAF could be the problem?
35 what??? Sounds like it's lazy should switch back and forth like the other side...

and the MAF sounds like it needs to be replaced...
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