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

11,900

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

75,755

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

1,045

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 46,516 nationwide Elantra listings starting at $999.

ZIP:

Hyundai Elantra Experts

  • #1
    pittgirl
    Reputation
    2,070
  • #2
    Carrie Shelton
    Reputation
    1,430
  • #3
    Pirdman
    Reputation
    1,240
View All

Related Models For Sale

Used Hyundai Sonata
595 Great Deals out of 54,267 listings starting at $1,500
Used Honda Civic
601 Great Deals out of 52,409 listings starting at $999
Used Toyota Corolla
941 Great Deals out of 70,520 listings starting at $1,479
Used Honda Accord
801 Great Deals out of 89,314 listings starting at $1,444
Used Toyota Camry
1,125 Great Deals out of 76,738 listings starting at $1,100
Used Hyundai Accent
265 Great Deals out of 12,282 listings starting at $1,950
Used Nissan Altima
1,154 Great Deals out of 74,274 listings starting at $900
Used Kia Optima
486 Great Deals out of 31,982 listings starting at $2,450
Used Mazda MAZDA3
250 Great Deals out of 27,360 listings starting at $1,495
Used Ford Focus
605 Great Deals out of 69,890 listings starting at $1,495
Used Nissan Sentra
682 Great Deals out of 53,549 listings starting at $1,800

Used Cars For Sale

2018 Hyundai Elantra For Sale
8 Great Deals out of 25,707 listings starting at $10,824
2017 Hyundai Elantra For Sale
153 Great Deals out of 6,971 listings starting at $7,900
2016 Hyundai Elantra For Sale
60 Great Deals out of 2,718 listings starting at $6,700
2015 Hyundai Elantra For Sale
137 Great Deals out of 3,276 listings starting at $6,990
2014 Hyundai Elantra For Sale
76 Great Deals out of 1,566 listings starting at $5,499

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.