I have a 2000 ford excursion with v-10 engine the service engine light has recently come on andbeing checked at az says 02 sensor right bank so i changed it the light stayed off momemtarily thus going back to az code reads 02 sensor for laughs and giggles i changed in hope of bad sensor light still comes on.Any suggestions going broke between gas and sensors

 

It would be more help if you had the exact code number since there are 4 O2 sensors on your vehicle.

 

Ok hanky dont recall just yet will retrieve an dget back thanks for reply

 

I had my 2000 excursion v-10 checked and it comes up with codes po135andpo155 any other causes besides 02 sensors have changed both

 

The description I have for those codes involves the heater circuit for both of those sensors. The first thing I would suggest that you check would be the fuses. They are turned on by the PCM (powertrain control module) but protected by a fuse. If one of those sensors you removed was defective it could have caused a fuse to blow. So could a wire feeding the power to them that might have been touching something and worn off the insulation. I don't know at this time which fuse it could be , but if you have the owner's manual it would provide a description of what each fuse protects. You would just read and look for the fuse that says oxygen heater circuit.

 

Thank you hanky for your response will try .