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

83,485

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

Your Answer

Add photo

Related Questions

  • 2000 VW Passat rpm drops cuts off when stops 1 answer

    Please help! have a 2000 VW Passat about 110k miles on it and my check engine light is on. I had it ran and the codes that popped up were P0441 Evap control system incorrect purge flow P0134 H02S (...

    2000 Volkswagen Passat GLS V6

    -

    Maintenance & Repair

  • 1992 VW Passat won't start 16 answers

    My son's 1992 VW Passat died about 200 feet from our house. There were no problems before it died. Now it turns over but won't start. The mechanic thinks it's a bad fuel distributor, but isn't sure....

    1992 Volkswagen Passat 4 Dr GL Sedan

    -

    Maintenance & Repair

  • sorry , it is a 1995 vw. passat 1 answer

    i need to know where the car alarm is for a 1995 vw passat , because it goes off even when the car is going i need to unplug it . thanks ...

    1995 Volkswagen Passat

    -

    Maintenance & Repair

  • Vw passat won't start 17 answers

    I have a 2006 vw passat 2.0 100 k miles. It won't start I've put a new fuel pump on battery and new alternator and still no look on starting. I have had an auto elec to see if it's and wires they se...

    2006 Volkswagen Passat

    -

    Maintenance & Repair

  • how to mute my stereo in my 2014 VW Passat 3 answers

    how to mute my stereo in my 2014 VW Passat

    Volkswagen Passat

    -

    General

Search Volkswagen Passat Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Volkswagen Passat Experts

#1 tenspeed
tenspeed
Reputation 1,120
#2 Tom Demyan
Tom Demyan
Reputation 1,100
#3 valeriewalk
valeriewalk
Reputation 970
View All

Related Models For Sale

Used Volkswagen Jetta
490 Great Deals out of 31,318 listings starting at $1,000
Used Honda Accord
1,003 Great Deals out of 74,760 listings starting at $899
Used Toyota Camry
1,128 Great Deals out of 96,508 listings starting at $1,250
Used Audi A4
311 Great Deals out of 11,992 listings starting at $800
Used BMW 3 Series
1,463 Great Deals out of 38,440 listings starting at $1,890
Used Nissan Altima
1,060 Great Deals out of 82,198 listings starting at $1,988
Used Honda Civic
799 Great Deals out of 70,155 listings starting at $1,200
Used Volkswagen GTI
130 Great Deals out of 6,148 listings starting at $1,499
Used Volkswagen Touareg
47 Great Deals out of 2,465 listings starting at $2,500
Used Volkswagen Golf
39 Great Deals out of 2,748 listings starting at $1,995
Used Ford Fusion
1,044 Great Deals out of 76,049 listings starting at $999
Used Chevrolet Malibu
1,108 Great Deals out of 82,568 listings starting at $2,328
Used Mercedes-Benz C-Class
618 Great Deals out of 32,115 listings starting at $2,500

Used Cars For Sale

2017 Volkswagen Passat For Sale
12,797 listings starting at $15,995
2016 Volkswagen Passat For Sale
11 Great Deals out of 1,050 listings starting at $12,533
2015 Volkswagen Passat For Sale
63 Great Deals out of 2,757 listings starting at $9,741
2014 Volkswagen Passat For Sale
30 Great Deals out of 856 listings starting at $8,591
2013 Volkswagen Passat For Sale
45 Great Deals out of 1,083 listings starting at $5,000