2003 Outback Wagon H6-3.0 O2 Sensor Location

[mousouchop]

I apologize... I realize that this has been asked 1000000 times... trust me, I just read ALL of these darn threads trying to figure out location... and I am still confused.

Had my CEL go on, took it to a friend that had a ODB-II reader, told me the code being thrown was for O2 Sensor Bank 2 Sensor 1. From what I have read, this is one of the pre-cat sensors... I just don't know what side I should be installing it on... The passenger side? Or the driver side?

This is the part that I plan to order from Subarupartsforyou.com as a replacement. Wouldn't mind comment on whether or not this is the right part too: http://www.subarupartsforyou.com/cp_...p?partid=11902

Sorry to be annoying, but I wouldn't mind some positive comments from some experience H6 engine repairmen.

Thank you!

EDIT: Found a rather detailed diagram of the exhaust setup... but it doesn't list the sensor Bank/Sensor #s. Uploaded the pdf for reference.

[CNY_Dave]

Problem with H6 advice is that they don't need fixing often, so the experience pool is somewhat shallow...

And yeah, C or D.

"AIR FUEL RATIO SENSOR FOR 2001-2004 LEGACY OUTBACK H6 MOTOR ONLY (car uses same sensor for left or right side ITEM C or D) sold individually" "22641AA03C front H6 "



Dave

[mousouchop]

Originally Posted by CNY_Dave

Problem with H6 advice is that they don't need fixing often, so the experience pool is somewhat shallow...

And yeah, C or D.

"AIR FUEL RATIO SENSOR FOR 2001-2004 LEGACY OUTBACK H6 MOTOR ONLY (car uses same sensor for left or right side ITEM C or D) sold individually" "22641AA03C front H6 "

Dave

Thanks.

I just called my local dealership and they said Bank 2 Sensor 1 is driverside, pre-cat sensor.

Now I just have to decide if I want to drive 30 minutes to buy it for 180$ there, or order it off SPFY for 145$ (130+15$ shipping). Sorta feel like I owe them the sale now that they helped me out... but it will end up costing me 200$ after I factor in gas. -_-

[182RG]

Suggest you do both precat sensors.

[mousouchop]

Originally Posted by 182RG

Suggest you do both precat sensors.

The car only has 60k miles on it. I read that they can last up to 150k... Don't really have the spare cash right now to do both. I am hoping this one dying was a fluke. Just need to get that CEL off. I have to get an inspection this month. ><

[CNY_Dave]

160k on my O2 sensors.

Have you tried clearing the code and seeing if it comes back?

Have you checked the wiring?

Dave

[wilsonhp]

I had all three of mine replaced at about 190K miles, hoping for mileage improvements. Nothing gained. NO codes or anything, it just seemed like time to do it, but apparently not needed at that point.

They are pricey.............

[CNY_Dave]

So you have 3 used ones for sale?

Dave

[BAZ]

Bank 2 is indeed the driver side (left side as you sit in the car) on the USA Subaru.
I corrected a P0051 code by replacing the driver-side sensor -- after I'd first installed it on the wrong (passenger) side due to the confusion in these forums on which is which.

Check out the service manual document at the link below - lots of H6 engine troubleshooting information, including pin-outs for checking voltages and resistance on these expensive sensors.

http://www.subaru-car.ru/leg1/leg1_sec1_11-2.pdf

Good Luck

[mousouchop]

Well another sensor went, so just to be absolutely thorough in my documentation of these things, I thought I'd make a new post to help other confused people out in the future.

O2 Sensor CEL Codes:
P0051 - Bank 2 Sensor 1 Sensor
P0031 - Bank 1 Sensor 1 Sensor
P0134 - Bank 1 Sensor 1 Wiring Harness (included in below listed part number)

O2 Sensor Locations:
Bank 1 Sensor 1 - Passenger Side Pre-Cat Sensor
Bank 2 Sensor 1 - Driver Side Pre-Cat Sensor

Bank 1 Sensor 1 & Bank 2 Sensor 1 Replacement Part No.: 22641AA03C

I'm sure there's others out there that like to see this information in black and white for verification, and this thread seems to come up pretty high in Google when searching for H6 O2 sensor locations.