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

106,505

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 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

106,505

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 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 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.

1,185

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

1,185

or around there

Alright sweet thanks man

285

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

1 people found this helpful.

Your Answer

Civic

Looking for a Used Civic in your area?

CarGurus has 52,978 nationwide Civic listings starting at $1,200.

ZIP:

Honda Civic Experts

  • #1
    Tom Demyan
    Reputation
    1,240
  • #2
    Takoda Fraser
    Reputation
    1,050
  • #3
    Jonathan Ford
    Reputation
    1,040
View All

Related Models For Sale

Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200
Used Toyota Corolla
571 Great Deals out of 66,738 listings starting at $1,449
Used Toyota Camry
761 Great Deals out of 70,900 listings starting at $1,200
Used Hyundai Elantra
423 Great Deals out of 48,041 listings starting at $1,995
Used Honda Accord Coupe
104 Great Deals out of 4,083 listings starting at $1,950
Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Hyundai Sonata
365 Great Deals out of 49,687 listings starting at $1,250

Used Cars For Sale

2018 Honda Civic For Sale
30,288 listings starting at $15,830
2017 Honda Civic For Sale
34 Great Deals out of 2,630 listings starting at $14,483
2016 Honda Civic For Sale
29 Great Deals out of 2,620 listings starting at $10,991
2015 Honda Civic For Sale
114 Great Deals out of 7,783 listings starting at $8,988
2014 Honda Civic For Sale
27 Great Deals out of 1,498 listings starting at $6,305

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.