O2 sensor on a 2002 Mazda mpv

Asked by Oct 22, 2017 at 07:21 PM about the 2002 Mazda MPV

Question type: General

Why would my exhaust
heat up red hot around my
O2 sensor before the
catalytic converter on a
Mazda mpv

4 Answers

24,105

Catalytic converter must be clogged.

Can't be I hollowed out the catalytic converter

24,105

Air/fuel mixture is off.

24,105

There is a whole multitude of reasons for this. From bad/clogged EGR to dirty fuel injectors. Vacuum leaks, Running to rich to running to lean. A bad spark plug to burnt valve. Low fuel pressure from pump to dirty fuel filter, basically anything altering the fuel/air mixture. Most often running to lean & ignition timing which in this case is computer controlled so it has to be that the computer is not getting the correct information to determine the correct mixture or is hindered in being able to correct it. Possibilities could also be electrical connections to sensors that the computer rely on. The computer could be in limp mode, which could be computer issue if all others are in good working condition. I would test what can be tested and clean all that can be cleaned like the PCV, EGR & test it, Throttle body, IAC, pull fuel injectors and test or rebuild even if its just the small filters and o' rings kit, and fuel filter/air filter, fix all vacuum leaks, test fuel pressure, If check engine light is on scan code to see which system is showing up to test or clean and fix those issues related to that code, if all else fails put in a known good computer to test with.

Your Answer:

MPV

Looking for a Used MPV in your area?

CarGurus has 6 nationwide MPV listings and the tools to find you a great deal.

Postal Code:

Mazda MPV Experts

  • #1
    bobbyleveille
    Reputation
    1,060
  • #2
    Gary John
    Reputation
    510
  • #3
    Michelle Ann
    Reputation
    340
View All

Related Models For Sale

Used Honda Odyssey
19 Great Deals out of 965 listings starting at $1,795
Used Toyota Sienna
19 Great Deals out of 752 listings starting at $2,950
Used Mazda MAZDA6
11 Great Deals out of 578 listings starting at $1,200
Used Nissan Quest
4 Great Deals out of 50 listings starting at $3,995
Used Mazda MX-5 Miata
3 Great Deals out of 212 listings starting at $6,900
Used Dodge Grand Caravan
120 Great Deals out of 9,981 listings starting at $2,000
Used Honda Pilot
13 Great Deals out of 726 listings starting at $6,495
Used Mazda Tribute
4 Great Deals out of 150 listings starting at $1,895
Used Chrysler Town & Country
15 Great Deals out of 420 listings starting at $5,898
Used Toyota RAV4
80 Great Deals out of 3,880 listings starting at $838

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.