Oxygen sensor downstream location

Tiny
STACYLYNN7
  • MEMBER
  • 2007 SATURN AURA
  • V6
  • AUTOMATIC
  • 150,000 MILES
Oxygen sensor downstream, where is it located? Is it in front on the passenger side?
Sunday, June 10th, 2018 AT 4:16 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi Stacy and thanks for using 2CarPros. Com.

I am not sure which V6 you have, so I will supply pictures of both. It indicates all sensors. A down stream sensor will be indicated as sensor 2. Now keep in mind, on the V6 engine, there are two different banks. I'm not sure which you are dealing with. If you have had the computer scanned, the code will indicate bank 1 or bank 2 as well as sensor 1 or sensor 2.

The first pic is the 3.5L. On the picture are numbers pointing to locations. Here are the descriptions for each number.

1 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
2 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
3 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
4 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2

_________________________________________________________

Here are locations for the 3.6L engine. Picture 2 correlate with these locations.

1 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
2 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
3 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
4 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2

I hope this is helpful. Let me know how it goes and if you have other questions.

Take care,
Joe
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Sunday, June 10th, 2018 AT 7:57 PM

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