Car ran fine, then 3 weeks later I pulled it out and after a few minutes, it would barely rev too 2500 rpms without missing really bad. Just took it out again and it finally through a code P0160 reads: o2 Sensor CKT NO activity (bank 2 Sensor 2). Would this cause the car too run terrible?Its starts and idles fine and even revs fine, but under load it will spit and sputter. cars has shorty headers, gutted cats and STS turbo. Thanks for the help. also, is it the driver rear 02 ???

 

what are your mods? that is the passenger side rear

 

yea depending on your mods, like exhaust, your O2s could be reading wrong A/F

 

mods are shorty hooker headers, gutted cats, and STS turbo. Thanks for the help

 

Bank 2 is pass side. If you gutted the cats, you need to do the rear O2 deletewith either the tune or simulators. It is probably in Cat protection mode which will command anywhere from 10 ~ 11 to 1 A/F ratio.

 

^^ I thought the rear O2's only monitor cat efficiency they have no effect on A/F ratio? I've got long tubes and I've never had a problem with no rear O2's just a CEL.

 

yeah, the car has had the guts gutted for a few years. no problems until a few days ago. I have 02 sims, I'll put them in today and see what happens.

 

still has the same problem with the sims in. car ran ok for about a minute and eighth mile, then it started misses really bad at 1500 rpm and up.

 

change the o2 sims and run the car for 50 miles and let it reprogram itself.

 

I can't run the car for even a few miles, it misses too bad.

 

no more po131 code, now I have a :

PO131 code, ( o2 sensor circiut, Low Volts, Bank 1 Sensor 1.

I decided too drive the car through the missing and it actually got better the more I drove it. Once I stop for 5-10 minutes, It will miss heavy again and then start getting better. Then the PO 131 code pop up. Is this driver front O2 sensoe, Thanks.

 

Yes that is driver side Front O2, those DO affect AFR. Get a set of new ones.

 

are the front 02 the same part number as the rear? AC 98? Thanks.