I have an 03 Audi A4 3.0 Quattro that wont start

5

Asked by 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

21,715

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.

12,105

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.
95

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 ?

12,105

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.

Has this be solved? My 04 is having the same issue as described.

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 12,607 nationwide A4 listings starting at $1,000.

ZIP:

Audi A4 Experts

  • #1
    Deathjam4
    Reputation
    4,170
  • #2
    Tom Demyan
    Reputation
    630
  • #3
    lukeyramone
    Reputation
    610
View All

Related Models For Sale

Used BMW 3 Series
833 Great Deals out of 32,432 listings starting at $995
Used Audi A6
133 Great Deals out of 7,662 listings starting at $2,295
Used Mercedes-Benz C-Class
668 Great Deals out of 25,818 listings starting at $1,488
Used Audi A3
102 Great Deals out of 6,627 listings starting at $2,995
Used Audi S4
19 Great Deals out of 1,611 listings starting at $4,000
Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200
Used BMW 5 Series
395 Great Deals out of 16,361 listings starting at $900
Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Mercedes-Benz E-Class
396 Great Deals out of 19,984 listings starting at $1,850
Used Audi A8
29 Great Deals out of 1,403 listings starting at $3,499
Used Toyota Camry
761 Great Deals out of 70,900 listings starting at $1,200

Used Cars For Sale

2018 Audi A4 For Sale
16 Great Deals out of 6,469 listings starting at $28,988
2017 Audi A4 For Sale
23 Great Deals out of 708 listings starting at $18,795
2016 Audi A4 For Sale
15 Great Deals out of 236 listings starting at $16,800
2015 Audi A4 For Sale
51 Great Deals out of 1,176 listings starting at $15,372
2014 Audi A4 For Sale
17 Great Deals out of 652 listings starting at $11,300

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.