I THINK IT WAS P1035
OK. This code sets because of the internal heater of the oxygen sensor is not getting hot. Considering you have replaced the sensors and the issued did not go away, I believe then that you either have a bad wire or perhaps the fuse that feeds the heater circuits is no good. Start by checking all the fuses in the underwood fuse block. The wire at the oxygen sensor is the pink wire and it should have battery power with the key on.
There are four oxygen sensors on the exhaust system on the not three.