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Replaced front O2 sensors, now a CEL

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Old Aug 24, 2007 | 05:41 PM
  #1  
dye7barrel's Avatar
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From: Maple Valley, WA
Replaced front O2 sensors, now a CEL

I replaced the O2 sensors on my 99 F150 with 140k about a week ago. The light first came on after the first 25 miles of driving with the new sensors. I took the truck to have the codes read and basically the front driver’s side oxygen sensor wasn't registering. I thought (...and hoped) I hadn't plugged in the sensor properly so I took it home and made sure everything was snug. Reset the computer and I was on my way. Drove 275 miles in one trip and the CEL hadn't come on. I figured I didn't plug in the sensor all the way and my problem was over.

I start my truck and back out of the driveway and BAM! The light comes back on. Awesome. I have the codes read again and its the same problem. The drivers side front oxygen sensor isn't reading. As a matter of fact, neither is the rear drivers side oxygen sensor but the code was only for the front. Unfortunately I can't remember the exact code...perhaps P0130..?? The reading on the scanner was 0.0% for the driver’s side and 0.7% for the passenger side.

I've spoken to a few people about the problem and one said to replace the driver’s side front sensor because it's defective. It's defiantly a possibility but that would be too easy. The other person said to replace the rear sensors and that should fix the problem. This sounds like a good idea but I would like to double check with everyone here before I shell out another $90.
 
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Old Aug 24, 2007 | 08:03 PM
  #2  
keith97xlt's Avatar
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From: mass.
possible you got a defective one. i wouldnt be concerned about the rear ones. make sure the wire isnt burnt thru somewhere touching the exhaust etc...
 
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Old Aug 24, 2007 | 08:53 PM
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jbrew's Avatar
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From: MI
Yea it takes 3 drive cycles for you to know EGR and O2 problems are fixed.

Get it read for free at Auto Zone and report back, I can help yuh then without guessing..
 
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Old Dec 1, 2007 | 06:47 PM
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dye7barrel's Avatar
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From: Maple Valley, WA
Alright, finally went to have the codes read and P1131 came up. I also exchanged the O2 sensor and the code came back on after a few minutes.
 
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