O2 sensor replacment

874 Views 3 Replies 3 Participants Last post by mostsleek, Mar 19, 2007

mostsleek

Discussion Starter · Mar 15, 2007

I have 2 codes PO135 and the other code is for the bank 2 sensor 2 (I can not recall the code). PO135 is for bank 1 sensor 1. The PO135 just started yesterday, the other has been on for about 2 months. My question is would it be wise to replace all 4 O2 sensors, bank 1 and 2 and sensors 1 and 2, or is this one of those if it ain't broke don't fix it kind of things? I know that this is a very talked about topic, and I did a search and filtered through the first couple of pages and could not find anything about replacing all 4 at once.

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chinaloy

· #2 · Mar 19, 2007

I replaced the front two a few months ago. No new codes since.

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low c1500

· #3 · Mar 19, 2007

Buy two new sensors, and put them in the front of each back. Then take the one good front one and put it in place of the bad rear one. The front sensors control fueling, and the rear sensors only monitor the health off the cat.

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mostsleek

Discussion Starter · #4 · Mar 19, 2007

low c1500 said:
Buy two new sensors, and put them in the front of each back. Then take the one good front one and put it in place of the bad rear one. The front sensors control fueling, and the rear sensors only monitor the health off the cat.

I knew that the rear sensors just checked the cat thats why I was in no hurry to fix it. But since the front control the fuel mix I will want to do that sooner. I will proabley do as you said, now I just have to find time...sigh

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