Replacing the A/F sensor

[mybigtrousers]

Hello Everyone,

I am new to this group so please forgive me if this question has been
asked and answered before. I have a 2001 Subaru Forester with 201, 000
Km on it. The infamous check engine light came on and I had it checked
by the dealer. The following codes came up:

Knock sensor 1 (high input) - P0328
Fuel Level Sensor Circuit (high input) - P0463
Fuel Trim (P0170)
O2 sensor circuit (lean) Bank 1 sensor 1 - P0130

I replaced the knock sensor myself and the check engine light went off
but the car was still running rough and now was sometimes stalling when
I came to a stop. Then the check engine light came back on!

I am going to replace the A/F sensor but was wondering if it something
I could do myself?

Any guidance/advice would be greatly appreciated.

Cheers!

 

[phatirejunky]

Hi,
I replaced the A/F (upstream of catalytic converter) sensor on my '02
Forester awhile back. As I recall, I used a boxed end wrench with
slight tap by a hammer to break loose. There are sockets designed for
removal/installation, but not really necessary.