Error code P0130 and P0170 - how to fix it?

[okiloveu]

Hi all,
Yesterday, I traveled about 400 miles then I stoped at a gas station to fill up my tank then after drove a little while I got Check Engine Light on...Lucky that I had the scanner with me, so I stoped I tried to see what wrong...I found out that I had 2 error codes:
P0130 (O2 sensor Cuitcuit Malfunction - Bank 1 Sensor 1) and
P 0170 (Fuel Trim Malfunction - Bank 1).
I did erase it then continued to drive home...then later I got the check engine light on again. Does anybody know what's wrong? How can I fix these problems?

Thanks for your help.

[vodica]

check K40 relay circuit board - usually burned contact.

worst case scenario MAF and/or O2 sensor

[netdvn]

P0170 is related to the MAF sensor (sometimes code P0173 comes on soon). Try to fix the problem at the lowest cost first - cleaning the MAF.