recently i throw a code. so i hooked up my scanner and it was P0135 said it was an 02 sensor heat circuit malfunction on bank 1 sensor 1. so i bought an 02 sensor and replaced it. its the driver side one at the front, but the light came back on. so i did some research and some ppl were saying that it could be a wire is getting hot because it take like 15-20 min of driving for it to come on, after i clear the code. i changed my valve covers to metal ones from vt and was thinking the extra heat over plastic might cause it to heat a wire...so i wire tied the wires away from the engine but it still came on. any sugestions would be much appreciated considering this happened right before i had to take it through inspection.