2001 Escape Oxygen sensor help please

Reply Subscribe

Thread Tools

Search this Thread

Oct 8, 2018 | 10:04 AM

husker3in4

Thread Starter

Junior User

Joined: Nov 2013

Posts: 69

Likes: 0

2001 Escape Oxygen sensor help please

I have a 2001 Escape XLT. Its throwing a code for Bank 1 sensor 2. I also have been getting reduced gas mileage the last year or so, which makes me think I may want to change all the O2 sensors. I think there are 4 sensors on this vehicle, and I have found them being sold all 4 in a package (2 upstream and 2 downstream). Can someone tell me if both upstream sensors are interchangeable with each other?Does anyone have a diagram of where they all are and which one is which?

Oct 9, 2018 | 05:55 AM

projectSHO89

Hotshot

Joined: Jan 2004

Posts: 19,760

Likes: 1,079

From: St Louis

Post the actual fault codes if you don't know for certain what you are doing (which is evident).

Oct 11, 2018 | 08:48 AM

husker3in4

Thread Starter

Junior User

Joined: Nov 2013

Posts: 69

Likes: 0

Thanks for your reply. I have 2 codes:

P2270 O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2

and

P2271 O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2

I know this is on the downstream so its more about emissions than gas mileage. I have 140k miles and still on original sensors so I figure Id just change them all at once. I can visually see them if I look, Im just not sure exactly which one is which.

Oct 11, 2018 | 10:37 AM

projectSHO89

Hotshot

Joined: Jan 2004

Posts: 19,760

Likes: 1,079

From: St Louis

It's more likely that spark plugs may need to be changed instead of all 4 O2 sensors assuming you have a V6 (not specified) in regards to fuel economy. How old are the plugs?

Are you sure about those codes (and the model year)? Ford's service documentation shows those codes as first being used for the 2003 model year.