How can you figure out which O2 sensor you need in 2009 Toyota Corolla . I had an emissions test and the code that failed was O2 sensor. how do you figure out which one? I'm replacing it myself.

40

Asked by Aug 18, 2015 at 05:17 PM about the 2009 Toyota Corolla S

Question type: Maintenance & Repair

I had an emission test done on my 2009 Toyota Corolla S and it failed.  The code that
failed was P0037.  They told me they don't know anything and to go to a mechanic.  I
looked it up (my engine light was on, as well) and it came up O2 sensor.  I spoke with
Toyota to get some info and they wanted me to bring it in and charge me an arm and a
leg. They did say that it is usually only one that goes bad at a time.  I'm trying to figure
out how you test for that.  Should I just go to auto zone and see if they can help?  I am
replacing it myself.  Also, inquiring on price..they range from $40-160.. I was hoping if I
only need one not to spend more than $60-80 I want quality but I don't want the most
expensive, especially if I do not really need to spend that amount.

9 Answers

70,875

It's going to be the downstream (after the catalytic converter) sensor. HTH. -Jim

2 of 2 people found this helpful.
40

Thank you Jim

2 of 2 people found this helpful.
70,875

You're welcome. Glad to help. -Jim

2 of 2 people found this helpful.

Jim is spot-on. You can trust his advice. The guys at Auto-Zone will scan it and some of them know what they are doing, others not so much. Just remember (some of them) are trying to sell you something whether you need it or not. MOST are honest, but electronic parts can not be returned, even if never installed. And the dealer you hit the proverbial nail on the head.... and Auto-Zone guys will not test the sensor, only tell you what they read on OBDII scanner. yes, each 02 sensor can be tested, but some of them are heated electrically and often the problem is not the sensor it's self, but rather the wiring to it. In the next window is a link that explains how to test an 02 senso

3 of 3 people found this helpful.

https://www.youtube.com/watch?v=7uqmYkl7t0c

1 of 1 people found this helpful.

https://www.youtube.com/watch?v=QM2jO0_Cah0

1 of 1 people found this helpful.

https://www.youtube.com/watch?v=YL6xkOZxHZ0

2 of 2 people found this helpful.

http://www.ehow.com/how_5193043_test-sensor.html

2 of 2 people found this helpful.
40

Thank you So much. Tremendous help.

2 of 2 people found this helpful.

Your Answer

Corolla

Looking for a Used Corolla in your area?

CarGurus has 53,296 nationwide Corolla listings starting at $1,502.

ZIP:

Toyota Corolla Experts

  • #1
    Tom Demyan
    Reputation
    2,480
  • #2
    tenspeed
    Reputation
    1,850
  • #3
    tennisshoes
    Reputation
    1,790
View All

Related Models For Sale

Used Toyota Camry
928 Great Deals out of 79,642 listings starting at $750
Used Honda Civic
760 Great Deals out of 69,159 listings starting at $1,499
Used Honda Accord
1,043 Great Deals out of 56,909 listings starting at $1,099
Used Toyota RAV4
716 Great Deals out of 44,953 listings starting at $1,600
Used Nissan Altima
979 Great Deals out of 77,113 listings starting at $1,000
Used Nissan Sentra
572 Great Deals out of 51,716 listings starting at $1,995
Used Hyundai Elantra
456 Great Deals out of 45,899 listings starting at $795
Used Toyota Tacoma
585 Great Deals out of 43,856 listings starting at $2,200
Used Toyota Prius
289 Great Deals out of 15,946 listings starting at $1,200
Used Mazda MAZDA3
347 Great Deals out of 25,926 listings starting at $950
Used Honda CR-V
752 Great Deals out of 55,441 listings starting at $1,750
Used Toyota Yaris
60 Great Deals out of 2,948 listings starting at $1,995
Used Ford Focus
790 Great Deals out of 54,717 listings starting at $1,895
Used Hyundai Sonata
731 Great Deals out of 50,009 listings starting at $500

Used Cars For Sale

2016 Toyota Corolla S For Sale
28 Great Deals out of 789 listings starting at $9,988
2015 Toyota Corolla S For Sale
23 Great Deals out of 749 listings starting at $9,245
2014 Toyota Corolla S For Sale
18 Great Deals out of 631 listings starting at $8,142

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.