Jester73440 said:Changed my oil about 300 miles ago and I only run BP and citgo if I have too.Wouldn't bad o2 sensors give a code? I had the car scanned not to long about and they said the o2 sensors were a little weak but still good and that was less then 4k miles ago. can you change just the front ? I have four right?
Lol. Was this a Ford dealer that told you they were "a little weak?" I've never heard them described like that.
It may not throw a code unless they are actually malfunctioning. If they have deposits all over them, they may not be sensing as accurately as they did new.. perhaps that's what they meant by weak.