will small hole in muffler cause codeP0420?

Asked by Sep 02, 2014 at 04:59 PM about the 1999 Chevrolet Silverado 1500 LS Standard Cab LB

Question type: Maintenance & Repair

have '99 silverado,,4'3-V6,,code P0420 appearring no misfire,,running
smooth,,,have small rust hole in muffler

5 Answers

150

no rust hole in muffler will not.

1 of 1 people found this helpful.

stamdame is right, to read up on the P0420 go to http://www.obd-codes.com/p0420

150

its the catalytic converter, make sure you replace the right one . Some cars have 3 cats

have read above code site,,,,,,that's where muffler leak idea came from,,,,truck had been recently tuned,,,,plug wire broke causing initial engine light,,,,,,reset ,,,,now showing P0420 but running smooth even under load only visible problem is inch by inch hole at rear of muffler before tailpipe exit

150

its impossible for hole in muffler to cause code. Theres nothing monitoring it. you could actually remove it and it wouldnt matter.

1 of 1 people found this helpful.

Your Answer

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 166,277 nationwide Silverado 1500 listings starting at $1,498.

ZIP:

Chevrolet Silverado 1500 Experts

  • #1
    John Carson
    Reputation
    2,480
  • #2
    Rowefast
    Reputation
    1,980
  • #3
    Andrew Olsen
    Reputation
    1,700
View All

Related Models For Sale

Used GMC Sierra 1500
903 Great Deals out of 65,094 listings starting at $2,495
Used Ford F-150
2,282 Great Deals out of 184,510 listings starting at $699
Used Dodge Ram 1500
354 Great Deals out of 10,747 listings starting at $1,500
Used Toyota Tundra
444 Great Deals out of 32,018 listings starting at $2,990
Used Toyota Tacoma
626 Great Deals out of 42,379 listings starting at $1,500
Used Chevrolet Tahoe
679 Great Deals out of 39,694 listings starting at $1,000
Used Ford F-250 Super Duty
358 Great Deals out of 44,722 listings starting at $1,799
Used Chevrolet Camaro
420 Great Deals out of 30,657 listings starting at $3,550
Used Chevrolet Silverado 2500
7 Great Deals out of 248 listings starting at $2,900
Used Ford Mustang
696 Great Deals out of 37,635 listings starting at $895

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
192 Great Deals out of 71,951 listings starting at $20,998
2016 Chevrolet Silverado 1500 For Sale
229 Great Deals out of 6,734 listings starting at $17,422
2015 Chevrolet Silverado 1500 For Sale
318 Great Deals out of 10,868 listings starting at $12,950
2014 Chevrolet Silverado 1500 For Sale
349 Great Deals out of 12,955 listings starting at $9,500
2013 Chevrolet Silverado 1500 For Sale
169 Great Deals out of 5,278 listings starting at $8,981

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.