I probably have to add that in case of the MAP sensor, the aftermarket replacement did not work for me. I had to go to OEM after about 2 month because I kept getting EGR problem code. Don't know how or why but the signal form aftermarket MAP was very noisy. Once I swapped to a new OEM sensor, the signal stabilized and the code cleared out. Do not have an explanation to this, except that my Monty is allergic to aftermarket parts

 

LOL, I will have to watch out for that one HunterD. That's a good one...

 

Hey everyone thanks for all the replys. I am just getting back to this issue and saw scannder danners video. I am going to run the tests. In his video he identifies the 02 montero sport bank 2 sensor 1 being the drivers side. Is this the case? I was under the impression that the bank 2 sensor 1 is on the passenger side. I have an 03 montero sport 3.0 2x4

 

Bank 2 is driver's side (US). Bank 1 is where the cylinder #1 is.

 

Well that makes sense... Ive been changing the passener side 02 sensor.. Guess Ill try the otherside.

 

You can always unplug a sensor and see what new code comes up to find out the bank side !!!!