I have an 03 Audi A4 3.0 Quattro that wont start

5

Asked by O'Bryan Jan 26, 2014 at 10:49 AM about the 2003 Audi A4 3.0 quattro Sedan AWD

Question type: Maintenance & Repair

I have an 03 Audi A4 3.0 Quattro and recently after the car has been driven for more
than 20 minutes and shut off it wont start but if I wait awhile like say an hour or more it
starts up like nothings wrong. The engine check light is on and I got that checked out
and its an O2 sensor but I don't know if that has anything to do with it, but when its
running it runs fine no problem no odd noises of anything and the battery delivers power
to everything in the car just wont start or even attempt to turn the car over. Also the
battery is brand new

7 Answers

44,955

What did the code say? If it was a lean code then the car needs a fuel pump and filter. The only time the o2 sensor needs changed is when it says heater circuit malfunction.

45,815

well the natural suspect would be either the fuel pump or a dirty fuel filter. but i would not rule out a fault maf sensor either start from the top and work your way down as i say. start with the spark plugs, work your way back to the coil pack. keep an eye out for cracked or worn wires but also broken plastic hoses. my old 98 a4 has a bad habbit of breaking these rubbery type plastic hoses all the time. If you have never replaced the fuel filter before do so now, and take out the mass air flow sensor and clean it with maf cleaner theroly. when i first bought my 98 it did the same thing till i cleaned the maf and changed the fuel filter

1 people found this helpful.
115

It could be the run relay, I had a VW do the same thing, dealer hunted for this problem for three years. Just a suggestion.

By any chance would you happen to know which one is the fuel pump relay ?

45,815

its either under the hood or under the dash and might be hard to remove due to its location. but its usually a square shaped short one. i think there is 2 of them in total under the dash.

40

my audi A4 also start this morning with a problem itsart and idele and when i switch it of and try to start again then it start and shutdown what can that be it is a 2l tdi help please

Your Answer:

A4

Looking for a Used A4 in your area?

CarGurus has 722 nationwide A4 listings starting at $1,500.

Postal Code:

CarGurus Experts

  • #1
    Deathjam4
    Reputation
    13,290
  • #2
    lukeyramone
    Reputation
    1,370
  • #3
    James III
    Reputation
    1,230
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used BMW 3 Series
69 Great Deals out of 1,205 listings starting at $1,995
Used Audi A6
3 Great Deals out of 116 listings starting at $7,999
Used Audi S4
5 Great Deals out of 89 listings starting at $12,995
Used Audi A3
18 Great Deals out of 387 listings starting at $3,977
Used Mercedes-Benz C-Class
81 Great Deals out of 1,429 listings starting at $3,499
Used Honda Accord
40 Great Deals out of 908 listings starting at $2,799
Used BMW 5 Series
27 Great Deals out of 332 listings starting at $4,800
Used Lexus IS
20 Great Deals out of 342 listings starting at $5,800
Used Mercedes-Benz E-Class
43 Great Deals out of 500 listings starting at $5,700

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. Content will be removed if CarGurus becomes aware that it violates our policies.