Check Engine LIght - Circuit O2 sensor bank2


Asked by MonteroTN Apr 09, 2010 at 10:38 AM about the 2003 Mitsubishi Montero Sport ES

Question type: Maintenance & Repair

According to OBD scan it says bank 2 sensor 2 which was the downline sensor has been replaced and the code cleared however each time I start the vehicle the light comes back on.  Flipped sensors to see if any other code would come up but no change.

Any ideas?

4 Answers


Replace your catalytic convertor. The downstream HO2s is only for catalyst efficiency.

3 people found this helpful.

Thank you I will give that a try. The shop thinks it is a computer problem. I will report back as to what the issue was once I find out and it is corrected


Well I got a direct bolt on replacement for the 2003 Montero from Eastern but no change the light still comes on after turning off the car and clearing the code. THe catalytic converter was 125.00, O2 sensor was 89.00 and light is still on and can not go through emmissions.

1 people found this helpful.

I'm having the same problem!!! Gonna change spark plug amd wires when o change the timing belt amd water pump. If that doesn't fix it then I will look in to oxygen sensor and cat. But I think it has 2 cats front y pipe and a rear one?

2 people found this helpful.

Your Answer:

Montero Sport

Looking for a Used Montero Sport in your area?

CarGurus has 1 nationwide Montero Sport listings and the tools to find you a great deal.

Postal Code:

Mitsubishi Montero Sport Experts

  • #1
    Jared Chase
  • #2
    Daniel Foster
  • #3
    G A Arne
View All

Find great deals from top-rated dealers


Related Models For Sale

Used Toyota 4Runner
6 Great Deals out of 445 listings starting at $2,560
Used Mitsubishi Outlander
22 Great Deals out of 1,117 listings starting at $2,599
Used Ford Ranger
11 Great Deals out of 805 listings starting at $4,950
Used Jeep Grand Cherokee
62 Great Deals out of 3,703 listings starting at $2,900
Used Ford F-150
106 Great Deals out of 8,029 listings starting at $871
Used Mitsubishi Endeavor
18 listings starting at $3,790
Used Toyota Camry
57 Great Deals out of 2,134 listings starting at $3,333
Used Toyota Sequoia
87 listings starting at $7,900
Used Nissan Pathfinder
35 Great Deals out of 959 listings starting at $3,900
Used Nissan Xterra
35 listings starting at $4,999

Used Cars for Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.