passing emissions

Asked by Apr 22, 2014 at 10:53 PM about the 2006 Hyundai Tucson Limited 2WD

Question type: Maintenance & Repair

I have a 6 cylinder Hyundai Tucson 2WD with about 123,000 miles.  I change the oil
regularly and had the appropriate serve done at about 65,000.  Now, however is will not
pass the state of MD emissions.  The diagnostic trouble codes are
P0430 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD BANK 2   
P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD BANK 1

KOER Result failed
MIL command status failed

Does anyone have any suggestions as to what this can be besides an entire $1600
replacement of the front catalytic converter?

Thanks so much
E. Carter

4 Answers

118,925

http://www.obd-codes.com/p0420

2 of 2 people found this helpful.
118,925

http://www.obd-codes.com/p0430 -- possibly o2 sensor bad, bad cat or exhaust leak

2 of 2 people found this helpful.
Best Answer Mark helpful
22,475

That's a puzzle, how does two cats go bad together, did you put an additive in the tank and melt the cores? was it running a misfire for the last year killing the cat.? go to parts and get a o2 bung extension for a side and it backs the rear sensor more away and fools it to thinking the core is cleaning things up, it cant get a good wiff of the passing carbons from an inoperable core. if results happen do the other side as you somehow got two

Many techs go to the sensors first and then check for exhaust or intake leaks and general condition of tune. This doesn't always result in solving issue. The manual suggests 5 different causes. Three have been mentioned already, other possibles are vapor cannister related and last one is possible ecm reflash due to age and miles. Smog techs that seem to know what they are doing many times suggest an ecm update to correct out of range parameters. Remember this if a po 430 and 420 code pops up together or one first then the other this doesn't mean their plugged, it means something is making them operate inefficiently.

Your Answer

Tucson

Looking for a Used Tucson in your area?

CarGurus has 21,650 nationwide Tucson listings starting at $1,500.

ZIP:

Hyundai Tucson Experts

  • #1
    Michael Kane
    Reputation
    930
  • #2
    Tom Demyan
    Reputation
    750
  • #3
    tennisshoes
    Reputation
    380
View All

Related Models For Sale

Used Hyundai Santa Fe
260 Great Deals out of 17,654 listings starting at $1,950
Used Honda CR-V
714 Great Deals out of 62,186 listings starting at $1,495
Used Toyota RAV4
633 Great Deals out of 61,512 listings starting at $1,995
Used Kia Sportage
234 Great Deals out of 18,017 listings starting at $1,795
Used Ford Escape
1,166 Great Deals out of 106,833 listings starting at $700
Used Kia Sorento
472 Great Deals out of 34,748 listings starting at $1,800
Used Hyundai Sonata
609 Great Deals out of 53,967 listings starting at $1,500
Used Chevrolet Equinox
1,022 Great Deals out of 77,426 listings starting at $2,222
Used Hyundai Elantra
574 Great Deals out of 46,119 listings starting at $495
Used Nissan Murano
445 Great Deals out of 24,605 listings starting at $400
Used Ford Edge
904 Great Deals out of 54,239 listings starting at $3,000
Used Toyota Camry
1,107 Great Deals out of 76,352 listings starting at $1,100

Used Cars For Sale

2017 Hyundai Tucson For Sale
48 Great Deals out of 6,879 listings starting at $15,900
2016 Hyundai Tucson For Sale
37 Great Deals out of 1,024 listings starting at $11,919
2015 Hyundai Tucson For Sale
36 Great Deals out of 862 listings starting at $9,980
2014 Hyundai Tucson For Sale
22 Great Deals out of 635 listings starting at $8,500
2013 Hyundai Tucson For Sale
19 Great Deals out of 528 listings starting at $8,595

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.