Which O2 sensor do I replace for code P0141?
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Team Owner
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From: The artist formally known as NONO5.0 Mobile, Al
Which O2 sensor do I replace for code P0141?
I know its a rear O2 I need to replace, and I believe it stated being the right side, but since the 02's in the rear swap sides,(ie the one hooked up on the passenger side harness goes into the drivers side pipe, and the one hooked up on the drivers side harness goes to the passenger side pipe) so which one do I want to replace for this code? The one going to the drivers side harness or the passenger side harness? 
Thanks for any help
Thanks for any help
Drifting
Joined: Mar 2005
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From: Northern VA
I know its a rear O2 I need to replace, and I believe it stated being the right side, but since the 02's in the rear swap sides,(ie the one hooked up on the passenger side harness goes into the drivers side pipe, and the one hooked up on the drivers side harness goes to the passenger side pipe) so which one do I want to replace for this code? The one going to the drivers side harness or the passenger side harness?
Thanks for any help
Thanks for any help
Should be drivers side rear.
Make sure to check wiring carefully first.
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Team Owner
Joined: Dec 2001
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From: The artist formally known as NONO5.0 Mobile, Al
Drifting
Joined: Mar 2005
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From: Northern VA
Doesn't matter what harness it's connected to... The one indicated by the code should be on the drivers side behind the cat.
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Team Owner
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From: The artist formally known as NONO5.0 Mobile, Al
See, that's where I'm confused....the way they're hooked up (on my car) is one o2 plugs into the harness on the drivers side and then screws into the passenger side pipe after the cat and the other o2 plugs into the harness on the passenger side and then screws into the drivers side pipe after the cat...so which one do ya replace?
Last edited by at88mph; Nov 3, 2007 at 07:39 PM.
Burning Brakes
Joined: Jul 2007
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From: hill billy hell
See, that's where I'm confused....the way they're hooked up (on my car) is one o2 plugs into the harness on the drivers side and then screws into the passenger side pipe after the cat and the other o2 plugs into the harness on the passenger side and then screws into the drivers side pipe after the cat...so which one do ya replace?
The driver side(bank 1 sensor 2) O2 connecting at the passenger side and the passenger side (bank 2 sensor 2) O2 connecting on the driver side.
Even though the driver side rear O2 sensor wiring harness connects to the passenger side,the PCM knows to read it as bank 1 sensor 2. That
is just how GM decided to run the connectors and wiring harness.
Like stated the O2 sensor you are looking to replace is on the driver side rear.
I hope I did not confuse you anymore
Thread Starter
Team Owner
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From: The artist formally known as NONO5.0 Mobile, Al
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Team Owner
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From: The artist formally known as NONO5.0 Mobile, Al
Thanks! Replaced it last night and drove it around all last night and today without the 'Check Engine' light coming on! 
