usafcamarodude

Ok guys i need some help the ses in my wifes car just came back on its a 2000 sentra 1.8l ive put a header on it and relocated the wires ive had no light for a year when all of a sudden bam i get stuck with

P0135
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

P0140
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

P0141
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

P0155
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

P0161
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)

I've checked the wires and there fine, however the harness for sensor 2 bank 1 was fried by the egr, i just bypassed the harness and hooked up the o2 wires straight to the wires on the other side of the harness but im still getting these codes any help would be appreciated, Im positive i hooked up the wires correctly i only did 1 at a time so as to not confuse the 4 wires however im still at a deadend and i don't want to take it in because of the wiring.