O2 Sensor problem after FI LTH install

Originally Posted by scott982

Yesterday I had Fast Intentions Long Tube Headers installed on my 2011 370Z. Everything went smoothly except for a CEL. The codes I am getting are p0051 (low voltage on the o2 heater) and p1168 (closed loop control function) on bank 2 sensor 1. The car is running really rough and I don't want to drive it until this issue is resolved. I don't see how the sensor could be bad, it unscrewed from the factory exhaust manifold very easily and the mechanic was very careful with it. It was never dropped or bumped into anything.

The mechanic warned me that extending the wires on the o2 sensor was a bad idea. Suggesting that I should extend the wires on the cars wiring harness instead. He said that the solder can screw up the resistance on the wires and cause all sorts of issues with AF readings. I told him to do exactly what the directions said and now I have this issue. My car only has 6,000 miles on it and everything was fine before the install. After some research I discovered that the 2011 370Z uses a different pre cat o2 sensor from the 09-10. I was thinking that could be the issue but the bank 1 sensor appears to be working fine. I have searched and was unable to find any members with the headers installed on a 2011.

After the light came on we pulled the sensor out and checked all the wiring and connectors. Everything looked fine. If anyone has any advice I would really appreciate it. I was going to call Tony in the morning, but I would really like to fix this tonight. It's cold, raining, and my only other way to work in the morning is my motorcycle.