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2005 Chevrolet Avalanche
Problem for Chevrolet 2005 Avalanche

2005 Chevy Silverado O2 sensor




By englee01 on Oct 16, 2008

" "
I have replaced all four O2 sensors with OEM parts but the codes still say they are failing. Is there a fuse that coul be blown. If so where is it. If not what else could be the problem

Same Problem

May 13, 2009

-   I have the same problem. All 4 O2 sensors say they are bad, so I checked the (15 amp) fuse under the hood on drivers side. It shows to be good also. Is there another relay/fuse that would control all the sensors or is there a wiring issue somewhere?-   Guest

Solution #1

posted on Oct 16, 2008
Not Rated)

emissionwiz

Rank: Guru  Chevrolet Expert Cars  Expert
Rating: 90%, 7814 votes
I 1st need to know the codes, the O2 heaters are fused, but without the codes don't know, check the fuse box for the O2 heater fuse, if it is not blown I will try to make out what is wrong from the codes
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