o2 sensor bad but which one
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Joined: Sep 2008
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From: denver colorado
o2 sensor bad but which one
my check engine light cam on bout a week ago and now i have a slight misfire at times that comes and goes had the code read it tells me it the bank 1 sensor 1 where is this located can any one help thanks
Legend
Joined: May 2005
Posts: 8,663
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From: Central Oklahoma
Bank 1 should be the upstream sensor. If you have a misfire, there are other issues you need to check, such as a cracked valve seat, misrouted plug wires, or a clogged cat.
FWIW - O2 sensors should be changed every 50 - 65K miles.
FWIW - O2 sensors should be changed every 50 - 65K miles.
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Joined: May 2008
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From: NH
Replace the O2 sensor quick. Because if you don't already have a clogged cat , you will. After you replace it , run some Techron + through it for a couple tank fulls and you might get lucky.
Legend
Joined: May 2005
Posts: 8,663
Likes: 8
From: Central Oklahoma
Running Techron will not cure a clogged cat.
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Joined: May 2008
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From: NH
I know that! But it will help clear out the carbon build up in the motor the bad O2 sensor has undoubtedly caused.And might get rid of the misfire.
Last edited by zman17; Oct 9, 2008 at 05:31 AM.