CODE 0420 ON A 2002 MONTE CARLO SS 3.8L ALSO RESONATOR PIPE IS LEAKING WILL THAT CAUSE THE CODE

20

Asked by Feb 07, 2013 at 12:14 PM about the 2002 Chevrolet Monte Carlo SS

Question type: Maintenance & Repair

WILL A LEAKING RESONATOR PIPE CAUSE THE P0420 ENGINE CODE

3 Answers

"catalyst system efficiency" yes, that's you buddy. Get it repaired!

2 of 2 people found this helpful.
2,230

same hear, get leak fixed, causing oxygen sensor to read wrong and causing computer to set the code.

2 of 2 people found this helpful.
20

Hey @TIMFLYF! I was wondering if fixing the resonator cleared the P0420. Many people say that a leak downstream of the Cat will not cause a code. I have feeling it might. I'm facing the same situation you were facing, so I'd appreciate your feedback!

2 of 2 people found this helpful.

Your Answer

Monte Carlo

Looking for a Used Monte Carlo in your area?

CarGurus has 1,252 nationwide Monte Carlo listings starting at $999.

ZIP:

Chevrolet Monte Carlo Experts

  • #1
    Js08016
    Reputation
    530
  • #2
    Tom Demyan
    Reputation
    520
  • #3
    John Saffrahn
    Reputation
    450
View All

Related Models For Sale

Used Chevrolet Impala
575 Great Deals out of 34,489 listings starting at $900
Used Chevrolet Camaro
463 Great Deals out of 31,613 listings starting at $1,450
Used Ford Mustang
603 Great Deals out of 39,399 listings starting at $1,895
Used Pontiac Grand Prix
15 Great Deals out of 2,659 listings starting at $1,750
Used Chevrolet Corvette
181 Great Deals out of 17,471 listings starting at $3,000
Used Chevrolet Silverado 1500
2,708 Great Deals out of 174,515 listings starting at $955
Used Chevrolet Malibu
1,074 Great Deals out of 62,439 listings starting at $880
Used Chevrolet Tahoe
808 Great Deals out of 42,075 listings starting at $1,987
Used Buick Regal
159 Great Deals out of 7,514 listings starting at $3,995

Used Cars For Sale

2007 Chevrolet Monte Carlo SS For Sale
3 Great Deals out of 36 listings starting at $4,999
2006 Chevrolet Monte Carlo SS For Sale
4 Great Deals out of 69 listings starting at $1,500
2005 Chevrolet Monte Carlo SS For Sale
24 listings starting at $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.