Obd code error P2270

[morgi27]

Hi guys after check engine light came on
I've plug in my code scanner and got P2270
O2 sensor signal stuck lean bank 1 sensor 2
I'm guessing this means the post sensor needs replacing?? Everything
the car is stock all I've done is changed spark plugs
Few weeks ago,I haven't cleared the code, but
I've read other people have and fault didn't appear again
Cheers

[morgi27]

Oh I forgot to add I have a foam filter in stock jcw airbox
Would this be causing any problems??
Mini Cooper s jcw r53

[James burbidge]

Clear the code and see if it comes up again.
Then maybe look into cleaning it if it can be cleaned or change it.
Good luck

[morgi27]

Yeah I will clear the code and see what happens, anybody had any problems
With opening the flap on jcw air box,people saying if mix is lean it's getting to much air??