What could be wrong with my car?

Asked by Nov 05, 2015 at 02:02 PM about the 2004 Hyundai Elantra

Question type: Maintenance & Repair

I have a check engine light on, it keep saying it's the catalytic converter. We replaced that twice, it did say it was the 02 sensor replaced that twice. My car when it warms up or has been driven awhile feels like it is going to stall when stopped at a light. The rpm will also go from 1-3 and then below 1. We also replaced the brain, they thought it was that, there are no vacuum leaks had that checked out. I do not know what else to do.

3 Answers

11,690

The only thing left is the Muffler is clogged ... Take it to Midas before you spend a fortune on it .....2 Catalytic Converters ??????

74,095

Check the emissions decal under the hood. If you have California Emissions a Federal Emissions catalytic converter will not work. Check the wiring going to the downstream oxygen sensor. Make sure it's ok. HTH. -Jim

1,035

car has 2 02 oxygen sensor upper and lower and check flex pipe

Your Answer

Elantra

Looking for a Used Elantra in your area?

CarGurus has 3,539 nationwide Elantra listings starting at $1,435.

ZIP:

Hyundai Elantra Experts

  • #1
    pittgirl
    Reputation
    2,040
  • #2
    Carrie Shelton
    Reputation
    1,430
  • #3
    Pirdman
    Reputation
    1,200
View All

Related Models For Sale

Used Hyundai Sonata
39 Great Deals out of 1,299 listings starting at $1,995
Used Honda Civic
286 Great Deals out of 4,290 listings starting at $1,815
Used Toyota Corolla
201 Great Deals out of 3,594 listings starting at $2,411
Used Toyota Camry
79 Great Deals out of 2,182 listings starting at $1,900
Used Honda Accord
63 Great Deals out of 1,175 listings starting at $1,488
Used Hyundai Accent
74 Great Deals out of 1,597 listings starting at $1,795
Used Nissan Altima
86 Great Deals out of 1,253 listings starting at $2,200
Used Kia Optima
66 Great Deals out of 911 listings starting at $200
Used Ford Focus
84 Great Deals out of 2,454 listings starting at $1,200
Used Mazda MAZDA3
150 Great Deals out of 2,624 listings starting at $1,995
Used Nissan Sentra
175 Great Deals out of 1,817 listings starting at $2,200

Used Cars For Sale

2018 Hyundai Elantra For Sale
7 Great Deals out of 1,181 listings starting at $15,995
2017 Hyundai Elantra For Sale
23 Great Deals out of 623 listings starting at $13,988
2016 Hyundai Elantra For Sale
57 Great Deals out of 419 listings starting at $9,800
2015 Hyundai Elantra For Sale
30 Great Deals out of 261 listings starting at $7,990
2014 Hyundai Elantra For Sale
10 Great Deals out of 136 listings starting at $7,892

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.