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

98,545

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
    1,320
  • #2
    Tom Demyan
    Reputation
    1,250
  • #3
    Chrisand Edwards
    Reputation
    1,160
View All

Related Models For Sale

Used Volkswagen Jetta
517 Great Deals out of 41,369 listings starting at $1,000
Used Honda Accord
1,033 Great Deals out of 61,575 listings starting at $999
Used Toyota Camry
1,042 Great Deals out of 70,974 listings starting at $750
Used Audi A4
290 Great Deals out of 10,675 listings starting at $1,500
Used BMW 3 Series
1,013 Great Deals out of 31,213 listings starting at $1,000
Used Nissan Altima
1,067 Great Deals out of 74,067 listings starting at $999
Used Honda Civic
791 Great Deals out of 76,969 listings starting at $888
Used Ford Fusion
1,025 Great Deals out of 76,309 listings starting at $895
Used Hyundai Sonata
684 Great Deals out of 47,324 listings starting at $1,995
Used Volkswagen Golf
74 Great Deals out of 5,203 listings starting at $1,500
Used Mazda MAZDA6
157 Great Deals out of 13,009 listings starting at $1,395
Used Volkswagen GTI
105 Great Deals out of 8,555 listings starting at $2,000
Used Chevrolet Malibu
1,205 Great Deals out of 77,230 listings starting at $1,500

Used Cars For Sale

2017 Volkswagen Passat For Sale
20 Great Deals out of 12,633 listings starting at $14,140
2016 Volkswagen Passat For Sale
57 Great Deals out of 1,543 listings starting at $10,992
2015 Volkswagen Passat For Sale
103 Great Deals out of 2,616 listings starting at $6,999
2014 Volkswagen Passat For Sale
52 Great Deals out of 1,677 listings starting at $6,495
2013 Volkswagen Passat For Sale
47 Great Deals out of 1,417 listings starting at $5,991

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.