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

140

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

140

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

140

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 183,385 nationwide Silverado 1500 listings starting at $1,900.

ZIP:

Chevrolet Silverado 1500 Experts

  • #1
    John Carson
    Reputation
    2,450
  • #2
    Rowefast
    Reputation
    1,960
  • #3
    Andrew Olsen
    Reputation
    1,670
View All

Related Models For Sale

Used GMC Sierra 1500
781 Great Deals out of 67,901 listings starting at $1,800
Used Ford F-150
2,221 Great Deals out of 180,841 listings starting at $1,500
Used Dodge Ram 1500
411 Great Deals out of 10,661 listings starting at $1,000
Used Toyota Tundra
420 Great Deals out of 33,613 listings starting at $1,999
Used Toyota Tacoma
563 Great Deals out of 41,765 listings starting at $2,999
Used Chevrolet Tahoe
620 Great Deals out of 36,026 listings starting at $1,800
Used Chevrolet Camaro
429 Great Deals out of 31,674 listings starting at $2,395
Used Ford F-250 Super Duty
330 Great Deals out of 43,284 listings starting at $1,250
Used Chevrolet Silverado 2500
8 Great Deals out of 243 listings starting at $3,995
Used Ford Mustang
740 Great Deals out of 42,668 listings starting at $1,300

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
337 Great Deals out of 111,307 listings starting at $20,107
2016 Chevrolet Silverado 1500 For Sale
151 Great Deals out of 5,985 listings starting at $17,995
2015 Chevrolet Silverado 1500 For Sale
262 Great Deals out of 8,944 listings starting at $12,950
2014 Chevrolet Silverado 1500 For Sale
351 Great Deals out of 11,799 listings starting at $9,999
2013 Chevrolet Silverado 1500 For Sale
153 Great Deals out of 5,021 listings starting at $7,974

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.