does my 91 honda civic base model hatchback have one or two o2 sensors?

Asked by Apr 13, 2013 at 11:34 AM about the 1991 Honda Civic Hatchback

Question type: Maintenance & Repair

I have a 91 honda civic base model hatchback and I need to know if it has one or two o2 sensors. could some please
help me out with this?

10 Answers

101,415

Usually there are two sensors. The first one is upstream of the converter. It is called bank one, sensor one. The first sensor provides feedback to the fuel trim to adjust the mixture. The second sensor is down stream of the converter and it called bank one, sensor two. It tells you if he catalytic converter is working in most cars. -- In some cars the second sensor is used in fuel trim too.

1 of 1 people found this helpful.

I have the one up in my header but I cant figure out where the plug is at for the second sensor to plug into

101,415

If you have a second sensor, it would be after the catalytic converter. Check with other owners on a Honda forum. You may have only one sensor or someone removed the cat and sensor. Do you have a check engine light?

1 of 1 people found this helpful.

Yeah it comes on after driving for a while the person I bought the car from home made the header and exhaust so the eliminated the cat and everything but I have a new header and I bought a brand new exhaust and cat for it now I just gotta find the plug so I can plug the second sensor in if there is a second sensor on it

click the image it might help

2 of 2 people found this helpful.

That did help some, I just hope they didnt cut the plug off or anything, thanks for the help man I appreciate it.

1,165

you have a 91 it only has the one on the upper portion of the header trust me you wont find one on the cat they didnt do that till like 2002 i do believe

1,165

or around there

Alright sweet thanks man

275

88-91 d15b only have the ox sensor in the exhaust manifold.

1 of 1 people found this helpful.

Your Answer

Civic

Looking for a Used Civic in your area?

CarGurus has 70,341 nationwide Civic listings starting at $1,499.

ZIP:

Honda Civic Experts

  • #1
    Tom Demyan
    Reputation
    1,110
  • #2
    Takoda Fraser
    Reputation
    1,030
  • #3
    Jonathan Ford
    Reputation
    1,010
View All

Related Models For Sale

Used Honda Accord
1,030 Great Deals out of 59,784 listings starting at $1,099
Used Toyota Corolla
812 Great Deals out of 54,978 listings starting at $1,200
Used Toyota Camry
955 Great Deals out of 82,112 listings starting at $999
Used Hyundai Elantra
478 Great Deals out of 46,927 listings starting at $1,950
Used Honda Accord Coupe
148 Great Deals out of 8,364 listings starting at $1,450
Used Ford Mustang
597 Great Deals out of 36,395 listings starting at $1,200
Used BMW 3 Series
1,083 Great Deals out of 33,742 listings starting at $1,000
Used Hyundai Sonata
754 Great Deals out of 50,888 listings starting at $500

Used Cars For Sale

2017 Honda Civic For Sale
19 Great Deals out of 44,694 listings starting at $16,393
2016 Honda Civic For Sale
97 Great Deals out of 2,578 listings starting at $11,695
2015 Honda Civic For Sale
148 Great Deals out of 4,324 listings starting at $8,495
2014 Honda Civic For Sale
195 Great Deals out of 5,704 listings starting at $6,500
2013 Honda Civic For Sale
80 Great Deals out of 1,745 listings starting at $6,580

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.