My A4 starts rough

Asked by Nov 23, 2017 at 02:58 PM about the Audi A4

Question type: Maintenance & Repair

After getting error codes P2178 and P2188 and replacing the three  sensors,
my A4 ran well for a few hours. After I stopped it and tried starting it again after
about an hour, it felt like the engine was flooded and it sputtered and bogged. I
am afraid to try driving it. Help!!! What could the problem be?

2 Answers


One code you posted is lean condition, the other a rich condition, with that being said, that tells me, it's is not the O2 sensors. Those codes were indications the O2 sensor was detecting the problem. You could have a Vacuum leak, faulty crankcase breather valve, MAF, fuel issue, etc. Have an independent mechanic that works on German cars help diagnose it for you instead of throwing parts at the problem, it will give you piece of mind and get your car back on the road. Don't be afraid to drive it to the shop, as long as it gets there you will be fine.

1 people found this helpful.

when it comes to diagnosing a car its best to give as much information as possible such as what year is this car, what engine does it have, what trim level is it such as premium or such, is it a all wheel drive is it standard... you get the point at this point. and i would look at the spark plugs and check them for dirtyness and ware. if the plugs tips are burnt down and the piece of bent metal is rounded at a wierd spot like the corner your car is likely miss firing.

1 people found this helpful.

Your Answer:

Audi A4 Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used BMW 3 Series
83 Great Deals out of 2,035 listings starting at $1,500
Used Audi A6
7 Great Deals out of 182 listings starting at $3,490
Used Audi A5
14 Great Deals out of 207 listings starting at $10,333
Used Audi A3
14 Great Deals out of 334 listings starting at $4,495
Used Mercedes-Benz C-Class
92 Great Deals out of 1,623 listings starting at $3,480
Used Audi S4
8 Great Deals out of 139 listings starting at $8,980
Used BMW 5 Series
23 Great Deals out of 584 listings starting at $4,495
Used Honda Accord
29 Great Deals out of 1,638 listings starting at $1,500
Used Ford Mustang
28 Great Deals out of 1,228 listings starting at $5,995
Used Audi Q5
27 Great Deals out of 545 listings starting at $8,800
Used Audi A7
4 Great Deals out of 114 listings starting at $22,888
Used Dodge Charger
43 Great Deals out of 924 listings starting at $4,490
Used Volkswagen Jetta
77 Great Deals out of 2,871 listings starting at $2,900
Used Mercedes-Benz E-Class
31 Great Deals out of 658 listings starting at $4,400
Used Chevrolet Camaro
6 Great Deals out of 1,005 listings starting at $4,500

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.