Newly Installed full FVD Exhaust throwing off Oxygen Sensors

[JayAre]

I installed a complete Used FVD Brombacher exhaust this weekend. Headers, Cats, Mufflers, 02 Sensors. When installing the FVD exhaust I noticed that the post catalytic O2 sensors were on opposite sides of the stock headers. (2001 C2 Manual) The leads were not long enough to go to the opposite side connectors. So I plugged them into the sockets closest to them. I was able to drive for about 30 miles until the CEL light came on. I noticed the idle was a little off, would fluctuate between the 760 - 860 range I think . Car drove fine. When I got back home I checked the codes.

P01030 O2 Sensor Curcuit Bank 1
P1133
P1130 Oxygen Sensing
P1126 Oxygen Sensing
P0300 Random Misifre Detected
P0306 Misfire Cyl 6
P0304 Mis Cyl 4
P0305 Mis Cyl 5

02 Sensor Output 0.0v Bank 1 Sensor 1

 

I hope you enjoyed my drawings. 

Would this be due to the post cat O2 sensors be plugged into the opposite connectors? Plugs and tubes were replaced about 6K ago, all the coils looked fine. The 02 sensors came on the exhaust. Could this just be a bad O2 sensor? Would it be advisable to get the DME re tuned for the new exhaust?'

Thanks!

[JFP in PA]

7 hours ago, JayAre said:

I installed a complete Used FVD Brombacher exhaust this weekend. Headers, Cats, Mufflers, 02 Sensors. When installing the FVD exhaust I noticed that the post catalytic O2 sensors were on opposite sides of the stock headers. (2001 C2 Manual) The leads were not long enough to go to the opposite side connectors. So I plugged them into the sockets closest to them. I was able to drive for about 30 miles until the CEL light came on. I noticed the idle was a little off, would fluctuate between the 760 - 860 range I think . Car drove fine. When I got back home I checked the codes.

P01030 O2 Sensor Curcuit Bank 1
P1133
P1130 Oxygen Sensing
P1126 Oxygen Sensing
P0300 Random Misifre Detected
P0306 Misfire Cyl 6
P0304 Mis Cyl 4
P0305 Mis Cyl 5

02 Sensor Output 0.0v Bank 1 Sensor 1

 

I hope you enjoyed my drawings. 

Would this be due to the post cat O2 sensors be plugged into the opposite connectors? Plugs and tubes were replaced about 6K ago, all the coils looked fine. The 02 sensors came on the exhaust. Could this just be a bad O2 sensor? Would it be advisable to get the DME re tuned for the new exhaust?'

Thanks!

 

Most likely.