Hi,
I have a 2006 Mustang GT. I started to have the engine sign on the board, so i used my OBDII scanner and it gave me error O2 sensor Bank 1 Sensor 1. I understand that the sensor is malfunction and needs to be changed. Si it's on the passenger side upstream according to many information on google.
I bought a sensor from Motorcraft DY-1401 Gu2z-9G444-A and i changed it, but the engine signal came back and OBDII gave me the same code error.
What is the issue? any one had this before? any advice?
Thanks

 

Here is the P0135 code as described in the shop manual. As you can see there's lots of possibles, so what I may have had is not necessarily what you may be experiencing.

It tells you to go to pinpoint test DW, which is here. Then you go here. The first is to get you set up for what connector you are going to deal with. The second is the various tests.

It'll be time consuming, and it'll suck. But if you go through it, you'll find the answer directly instead of shotgunning it.

Good luck! And welcome to the forums!

 

Thanks Houtex, it is clear that it is not an easy task as it is. It seems it's not only changing the sensor that would solve the issue. The tests on possible causes need obviously a garage specialized in those vehicles to detect the issue. Frankly i am looking for an easy feasible reparation that can be done by a non mechanic person, so it seems also that it can be from a blown fuse as well according to some info on Google. Did this cross you?

 

yea the sensor is telling you something is wrong. like many others I changed the sensor thinking the sensor was bad. Sometimes its easier to just take in in to someone who knows how to fix it. Good luck