My 97 F150 put out a check engine light. i used a friends code scaner it said left bank number 2 snesor is running lean. the truck runs great not problem in power skipping or anything. so i swaped the #2 sensors from left to right and the problem did not change from left to right it stays on the left. after clearing the code a couple of time it comes back so i brought it to the shop. they said it was a #2, #2 meaning left bank second sensor. But they came up with a o2 heater problem and sense I moved the o2 sensors side to side it is not the sensor that is the problem. the shop has no idea and neither do I help if you can thanks.

 

Welcome to the forum.

Try tracing the wiring back from the O2 sensor. It could have a bare spot worn it it somewhere.