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

116,515

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

2 of 2 people found this helpful.
116,515

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
21,835

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 21,409 nationwide Tucson listings starting at $1,795.

ZIP:

Hyundai Tucson Experts

  • #1
    Michael Kane
    Reputation
    870
  • #2
    Tom Demyan
    Reputation
    730
  • #3
    tennisshoes
    Reputation
    340
View All

Related Models For Sale

Used Hyundai Santa Fe
287 Great Deals out of 18,391 listings starting at $995
Used Honda CR-V
903 Great Deals out of 59,695 listings starting at $1,495
Used Toyota RAV4
838 Great Deals out of 53,246 listings starting at $1,600
Used Kia Sportage
248 Great Deals out of 18,667 listings starting at $1,995
Used Ford Escape
1,311 Great Deals out of 103,948 listings starting at $895
Used Hyundai Sonata
909 Great Deals out of 56,689 listings starting at $1,500
Used Kia Sorento
473 Great Deals out of 32,119 listings starting at $2,290
Used Hyundai Elantra
675 Great Deals out of 50,724 listings starting at $1,500
Used Chevrolet Equinox
1,163 Great Deals out of 69,957 listings starting at $760
Used Nissan Murano
432 Great Deals out of 23,236 listings starting at $400
Used Honda Accord
1,129 Great Deals out of 73,674 listings starting at $1,100
Used Ford Edge
1,089 Great Deals out of 51,707 listings starting at $2,150

Used Cars For Sale

2017 Hyundai Tucson For Sale
53 Great Deals out of 16,126 listings starting at $14,050
2016 Hyundai Tucson For Sale
46 Great Deals out of 1,216 listings starting at $12,592
2015 Hyundai Tucson For Sale
34 Great Deals out of 970 listings starting at $9,988
2014 Hyundai Tucson For Sale
30 Great Deals out of 689 listings starting at $8,888
2013 Hyundai Tucson For Sale
33 Great Deals out of 607 listings starting at $7,474

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.