why may this be? switch itself? when i bought it it seemd fine then it wouldnt engage, just make a wierd clunking sound so i didnt use it. now the lights will flicker sometimes or all will sta on or all will turn off. hk engine light is on now and code says p1875 ( fwd drive low switch circuit) is this a 35$ fix? just the dash switch? is this making my vehicle lurch in overdrive? doesnt seem to do it when i shift manually. 2$ reward for the 1st person with the right answer.