this has been going on for almost a year. My check engine light comes on, so i go to AutoZone and check the code with the OBD2 scanner and the same to faults all the time. PO170 & PO172 one says "bank 1 fuel system to rich" and the other "bank 1 fuel trim malfunction".

Any ideas, these faults come and go. The check light will be on for a few days than it goes away and comes back a few days later. I tried getting some used 02 sensors to maybe fix the problem but those didn't help light still comes on.

I need some help people, anybody have this problem before with those two faults coming up?

 

why dont you try brand new o2 sensors instead of used ones that could be just as bad as your stock ones

 

well brand new ones cost like two hundred plus. And what are the odds the used 02 sensor had the exact same problem and isn't there a fault code for the 02 sensor.

I just don't want to buy a new 02 and still have the same problem. That's money down the drain

 

go to sparkplugs.com

They have o2 sensors for like 60 or something.