catalyst system efficiency below threshold bank 1 VW Passat

Asked by Aug 19, 2015 at 10:23 AM about the 2005 Volkswagen Passat GLS 4Motion

Question type: Maintenance & Repair

My question is that my engine light would always come on and stay on stating Catalyst system efficiency below threshold bank 1. I was told by the VW dealership i need a new catalytic converter. I put it on now the check engine light randomly will come on and off instead of it always being on before for the same error code. Any ideas would be great thanks. 2005 VW Passat GLS 4 Motion 1.8T 160,000KM (100,000MILES)

1 Answer

102,125

Try Mr. Gasket 120007 converter cleaner, sometimes it works sometimes it don't, just depends on what is contaminating the converter.

Your Answer

Volkswagen Passat Experts

  • #1
    tenspeed
    Reputation
    1,360
  • #2
    Tom Demyan
    Reputation
    1,280
  • #3
    Chrisand Edwards
    Reputation
    1,240
View All

Related Models For Sale

Used Volkswagen Jetta
604 Great Deals out of 34,792 listings starting at $1,400
Used Honda Accord
1,043 Great Deals out of 58,767 listings starting at $1,099
Used Toyota Camry
931 Great Deals out of 81,453 listings starting at $1,395
Used BMW 3 Series
1,090 Great Deals out of 33,464 listings starting at $1,000
Used Audi A4
283 Great Deals out of 11,973 listings starting at $199
Used Nissan Altima
1,001 Great Deals out of 78,292 listings starting at $1,000
Used Honda Civic
766 Great Deals out of 69,789 listings starting at $1,499
Used Hyundai Sonata
724 Great Deals out of 50,707 listings starting at $500
Used Ford Fusion
968 Great Deals out of 67,990 listings starting at $1,900
Used Volkswagen GTI
141 Great Deals out of 8,174 listings starting at $2,100
Used Volkswagen Golf
104 Great Deals out of 4,887 listings starting at $2,250
Used Volkswagen Touareg
70 Great Deals out of 2,510 listings starting at $2,992
Used Mercedes-Benz C-Class
723 Great Deals out of 28,277 listings starting at $1,000

Used Cars For Sale

2017 Volkswagen Passat For Sale
26 Great Deals out of 7,483 listings starting at $12,994
2016 Volkswagen Passat For Sale
48 Great Deals out of 1,394 listings starting at $9,991
2015 Volkswagen Passat For Sale
91 Great Deals out of 2,733 listings starting at $8,799
2014 Volkswagen Passat For Sale
67 Great Deals out of 2,094 listings starting at $6,499
2013 Volkswagen Passat For Sale
66 Great Deals out of 1,840 listings starting at $5,950

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.