2003 Huyndai Accent won't pass smog?

Asked by Sep 05, 2012 at 05:49 PM about the 2003 Hyundai Accent GL

Question type: Maintenance & Repair

I have a 2003 Hyundai Accent that recently did not pass smog (CA). mechanic suggested new spark plugs, repaired, came back, no luck. High NOX?  Anyhow, he stated that is was the catalytic converter, but that there is no aftermarket part, only dealer part. When I call the dealer to inquire about part purchase, they ask if the check engine light was on to indicate catalytic converter, otherwise, they say I should get a 2nd opinion since the part is non-refundable and installing it won't guarantee that the car will pass smog. Any other ideas as to what is causing the high NOX (?) value, I was told that an oxygen sensor alone won't help and we would probably need to replace that along with the catalytic converter.. Any suggestions? One small detail: my daughter accidentally put 1/2 gallon of diesel into her car 8 months ago (ran out of gas, went into dads garage and filled from gas container that she didn't realize was not gas) , it bogged and smoked like a dog until it was out, but no other apparent mechanical issues. we did change the spark plugs and fuel filter after that..Any suggestions?

2 Answers

95

i am an emissions inspector in connecticut, a 2003 car doesnt have to run on the dyno so the nox gas has nothing to do with you failing emissions. the reason you are failing as far as CT is concerned is because of the check engine light and whatever those codes are. get those fixed and you will pass

1 of 1 people found this helpful.
325

Have the EGR system inspected. For leaks a stuck open valve or large Carbon build, if it is cleaned out by your shop. Run a fuel system treatment. I stand by techron intake system cleaner, run your tank down to E add in Cleaner( after any service) and fill with plus or super fuel. Run the tank back Down on E to complete treatment. I've seen cars here in Massachusetts fail box for something as simple as cleaning the throttle body.

Your Answer

Hyundai Accent Experts

  • #1
    karibt
    Reputation
    1,150
  • #2
    dvigano
    Reputation
    1,000
  • #3
    Tom Demyan
    Reputation
    790
View All

Related Models For Sale

Used Hyundai Elantra
470 Great Deals out of 46,761 listings starting at $795
Used Toyota Corolla
775 Great Deals out of 54,489 listings starting at $1,500
Used Honda Civic
762 Great Deals out of 69,166 listings starting at $1,350
Used Hyundai Sonata
724 Great Deals out of 50,604 listings starting at $1,995
Used Ford Focus
769 Great Deals out of 55,467 listings starting at $800
Used Toyota Camry
911 Great Deals out of 81,894 listings starting at $999
Used Honda Accord
983 Great Deals out of 59,478 listings starting at $1,099
Used Kia Rio
68 Great Deals out of 7,009 listings starting at $1,999
Used Toyota Yaris
53 Great Deals out of 2,946 listings starting at $1,995
Used Mazda MAZDA3
324 Great Deals out of 26,200 listings starting at $950
Used Nissan Sentra
575 Great Deals out of 52,730 listings starting at $1,599
Used Ford Fiesta
167 Great Deals out of 16,762 listings starting at $2,599

Used Cars For Sale

2017 Hyundai Accent For Sale
16 Great Deals out of 6,174 listings starting at $7,950
2016 Hyundai Accent For Sale
64 Great Deals out of 2,461 listings starting at $7,041
2015 Hyundai Accent For Sale
36 Great Deals out of 914 listings starting at $6,495
2014 Hyundai Accent For Sale
32 Great Deals out of 761 listings starting at $5,900
2013 Hyundai Accent For Sale
28 Great Deals out of 578 listings starting at $3,999

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.