O2 sensor location

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Oct 2, 2010 | 04:34 PM

casper1999

Thread Starter

Laughing Gas

Joined: Feb 2006

Posts: 922

Likes: 80

From: Monroe, WA

O2 sensor location

Hi everyone, I have a question about a code on my Ranger. I have a 99 4X4 stick 4.0 120K,runs and drives like a dream,no complaints(except that darn shifter ****

) anyway the cel came on for the first time ever,P0133,Oxygen sensor bank 1...could please I get some help locating this guy and is there more than one?...the parts store told me that I had 4 on this truck,2 before the cat and 2 behind the cat..is this true?,I find it hard to believe. Anyway thanks for any input.

Oct 2, 2010 | 04:49 PM

powersmoked

Fleet Mechanic

Joined: Feb 2007

Posts: 1,716

Likes: 0

From: Boston, MA

Quote:

Originally Posted by casper1999

Hi everyone, I have a question about a code on my Ranger. I have a 99 4X4 stick 4.0 120K,runs and drives like a dream,no complaints(except that darn shifter ****

the p0133 is Bank 1 sensor 1 this is on the passenger side before the cat(closer to the engine). I looked up on rockauto for you it looks like they have a specific one for each side of the engine. it also appears that you have one after cat senosr. the precat ones are the ones that control engine managment. They were cheap on Rock auto $30 each

Oct 4, 2010 | 07:53 PM

casper1999

Thread Starter

Laughing Gas

Joined: Feb 2006

Posts: 922

Likes: 80

From: Monroe, WA

Thanks for clearing that up for me,I'll pick up the two before the cat and replace both so that the computer will be happy and then try to figure out the purpose of having one after the cat. Again thank you.