08-07-2019, 10:10 AM | #1 |
Registered
4
Rep 1
Posts |
O2 sensor location
Hi all. I've had my e71 50i for a little over a year and just started getting a CEL referencing Bank 1 Sensor 2. I get that Bank 1 is the (US) passenger side, and I get that Sensor 2 refers to the downstream sensor as opposed to the pre-cat sensor. I've attached a pic of Bank 2 for reference. Sorry for the noob question but is Sensor 2 the one on the top (red circle) or the side (green circle)? Or is it in a totally different location? If anyone has part numbers available, that would be a great help as well. Thanks in advance!
|
08-07-2019, 11:34 AM | #2 |
First Lieutenant
137
Rep 317
Posts |
Pretty basic, follow your exhaust flow from the turbo down.... Sensor #1 is pre-cat and upstream, sensor #2 is post-cat, or downstream. Aka. red is #1 green is #2.
|
Appreciate
0
|
08-07-2019, 02:06 PM | #3 | |
Banned
547
Rep 2,821
Posts
Drives: X5M F85
Join Date: Aug 2008
Location: SI NY
|
Quote:
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|