Secondary air injection system

Asked by May 11, 2018 at 10:33 PM about the 2001 Audi A4 1.8T quattro Sedan AWD

Question type: Maintenance & Repair

I bought a 2001 Audi A4 Quattro 1.8l that had
modifications done to it which involved deleting
most of the secondary air injection system. The
check engine light stays on and I get the p0412
secondary air injection switching valve circuit A
code. How do I go about fixing it?

1 Answer

12,455

you could always jsut go to the dealer and ask them to print out a diagram for you. You can also get the haynes manuel. Anouther thing is find anotuher car like yours and look at it and how its setup. If the guy took it off and it runs fine tho i would jsut leave it. other wise if it bugs you find a junk yard and take out the parts your missing.

Your Answer:

Audi A4 Experts

  • #1
    Deathjam4
    Reputation
    4,300
  • #2
    Tom Demyan
    Reputation
    670
  • #3
    lukeyramone
    Reputation
    640
View All

Related Models For Sale

Used BMW 3 Series
111 Great Deals out of 2,132 listings starting at $1,990
Used Audi A6
8 Great Deals out of 170 listings starting at $3,490
Used Audi A3
24 Great Deals out of 265 listings starting at $3,899
Used Mercedes-Benz C-Class
116 Great Deals out of 1,719 listings starting at $3,000
Used Audi S4
153 listings starting at $8,980
Used BMW 5 Series
25 Great Deals out of 582 listings starting at $3,990
Used Honda Accord
83 Great Deals out of 1,703 listings starting at $2,495
Used Ford Mustang
1,376 listings starting at $2,995
Used Honda Civic
326 Great Deals out of 5,369 listings starting at $1,356
Used Audi A8
35 listings starting at $6,995
Used Volkswagen Jetta
125 Great Deals out of 2,575 listings starting at $2,500

Used Cars For Sale

2018 Audi A4 For Sale
124 listings starting at $36,763
2017 Audi A4 For Sale
4 Great Deals out of 76 listings starting at $29,999
2016 Audi A4 For Sale
22 listings starting at $25,777
2015 Audi A4 For Sale
8 Great Deals out of 82 listings starting at $20,995
2014 Audi A4 For Sale
8 Great Deals out of 125 listings starting at $15,900

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.