O2 sensor lay lout
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Rock Crawling
Joined: Jul 2019
Posts: 261
Likes: 19
From: Dallas Texas
O2 sensor lay lout
Can someone tell me which o2 sensor is bank 1 sensor 1.
im getting code P0135 o2 sensor heater circuit and want to change the sensor out so I can pass an emissions test.
im getting code P0135 o2 sensor heater circuit and want to change the sensor out so I can pass an emissions test.
Thread Starter
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Rock Crawling
Joined: Jul 2019
Posts: 261
Likes: 19
From: Dallas Texas
Sensors before the converter closer to the engine are down stream or upstream?
Drifting
Joined: Sep 2018
Posts: 32
Likes: 8
If I'm getting an error on one of the O2 sensors and I just bought the truck, is it a good general practice to just replace all 4, or just the one that's coding? Obviously would like to not spend what I don't have to.
Camel Trophy
Joined: Dec 2009
Posts: 3,882
Likes: 950
From: Charlotte
There are those who say the upstream O2 sensors should be replaced in pairs. Those people are often mechanics who are selling sensors and being paid to replace them. If it ain't broke(n) don't fix it.
Last edited by mln01; Aug 24, 2019 at 12:59 PM.
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Rock Crawling
Joined: Jul 2019
Posts: 261
Likes: 19
From: Dallas Texas
Upstream (Position 1) is between the exhaust manifold and the catalytic converter. Downstream (Position 2) is after (downstream of) the catalytic converter.
I've owned my DII 17 years and the downstream O2s have not been replaced and have never thrown a code. If it ain't broke(n) don't fix it.
There are those who say the upstream O2 sensors should be replaced in pairs. Those people are often mechanics who are selling sensors and being paid to replace them. If it ain't broke(n) don't fix it.
I've owned my DII 17 years and the downstream O2s have not been replaced and have never thrown a code. If it ain't broke(n) don't fix it.
There are those who say the upstream O2 sensors should be replaced in pairs. Those people are often mechanics who are selling sensors and being paid to replace them. If it ain't broke(n) don't fix it.
Im only changing sensor 1 bank 1 which I知 assuming is the up stream sensor on the drivers side closer to the engine.
Correct?
sorry I知 a newbie.
Pro Wrench
Joined: May 2010
Posts: 1,918
Likes: 86
From: St Louis MO
Yes. Bank 1 sensor 1 is the upstream on the driver's side.
Pro Wrench
Joined: May 2010
Posts: 1,918
Likes: 86
From: St Louis MO
I've owned my DII 17 years and the downstream O2s have not been replaced and have never thrown a code. If it ain't broke(n) don't fix it.
There are those who say the upstream O2 sensors should be replaced in pairs. Those people are often mechanics who are selling sensors and being paid to replace them. If it ain't broke(n) don't fix it.
There are those who say the upstream O2 sensors should be replaced in pairs. Those people are often mechanics who are selling sensors and being paid to replace them. If it ain't broke(n) don't fix it.
I have owned mine for 13 years and have never replaced the downstream sensors. I myself did replace both upstream at 120k miles just because I knew they were old and probably not switching as fast as they should. Finally am getting an intermittent code for one of the downstream sensors. Until it becomes a consistent problem, I am not going to do anything but clear the code as all the downstream sensors do is monitor the converter to make sure it is working.