Fuel Gauge Stuck On Full

10

Asked by Nov 10, 2016 at 02:21 PM about the 2001 Audi TT Quattro Hatchback 180hp

Question type: Maintenance & Repair

Hi guys,

The fuel gauge on my Audi TT Quattro 2000 Mk1 is stuck on full. I tried the fuel
injection cleaner trick with one bottle and it did shift the needle back down but
only for an hour or so then went slowly back. Since then it has fluctuated a bit
but mainly stuck on full.
I did a vag-com (cheap ebay cable) on it and have posted the pic below &
hope you can make some sense from it as I dont know what it means. The
needle sweeps went perfect & I repeated to make sure. Cluster came back
with no faults. The top half of the segment cluster is out so it doesnt show
miles left in tank so im working off the trip but i have no idea of how many
miles to the litre i'm getting. Can you also tell me what the fuel sender
resistance in the pic means? and its relevance to the gauge.

Any help with this would be much appreciated guys, thanks.
Jim

3 Answers

67,375

Sounds like the problem is with the sending unit in the gas tank. It's actually part of the fuel pump module. Look on rockauto.com for a picture of the fuel pump module. You'll see an arm with a float on it. That's the sending unit. As the float goes up and down with the gasoline level in the tank the resistance value to the gauge changes. This positions the gauge needle where it's supposed to be. When a gas gauge always reads full it's a problem with the power (+) side of the circuit. Since you put the fuel injector cleaner in and it made a difference I'm betting that the sending unit in the gas tank is bad. HTH. -Jim

1 of 1 people found this helpful.
10

Thank you so much for the detailed answer and I'm sure you are 100% right as its pretty much what I suspected. I have another question if you could help me out as its quite serious. Recently the back end of the car has been spinning out. I wasnt going fast about 20 mph but it was wet. It has happened a few times in the past month, once when i was doing 70mph on a motorway luckily it was very late at night and didnt have my four year old daughter in the car. Any idea what could be causing this? as i'm afraid to take her in the car in case we get in an accident. Many thanks in advance - jim

1 of 1 people found this helpful.
67,375

You're welcome. Glad to help. It could be a problem with the rear brakes either dragging or locking up. Also, if you have two good tires and two not so good tires on the vehicle, the better tires should always be on the rear of the vehicle. This is for better water displacement and less chance of a skid. HTH. -Jim

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

  • Fuel Gauge Stuck On Full 3 answers

    Hi guys, The fuel gauge on my Audi TT Quattro 2000 Mk1 is stuck on full. I tried the fuel injection cleaner trick with one bottle and it did shift the needle back down but only for an hour or so t...

    2001 Audi TT Quattro Hatchback 180hp

    -

    Maintenance & Repair

  • Replaced fuel pump wont start 1 answer

    I just replaced my fuel pump on my 2001 Audi TT and went to start it afterwards and when i went to start it, it started but then stalled. I tried to start it again and it would not start. I can he...

    2001 Audi TT Quattro Roadster

    -

    Maintenance & Repair

  • air bag light is staying on 1 answer

    Hi What's wrong with my gorgeous car? The airbag light is staying on........

    2004 Audi TT Coupe Quattro

    -

    Maintenance & Repair

  • replace runflats on 2008 audi tt quatro with standard tires possible? 2 answers

    Is it possible to replace the runflats on an Audi TT 2008 quatro with standard tires without impacting the tire monitoring system?

    2008 Audi TT 3.2 Quattro

    -

    Maintenance & Repair

  • Need to step on the gas to start the car when it's been sitting for a few hours. 1 answer

    When my car has been sitting for few (approximately 4) hours or over night it requires me stepping on the gas petal, in order for it to start. It does not require this if it has only been sitting ...

    2008 Audi TT 2.0T Roadster

    -

    Maintenance & Repair

TT

Looking for a Used TT in your area?

CarGurus has 888 nationwide TT listings starting at $1,991.

ZIP:

Search Audi TT Questions

Audi TT Experts

#1 Tom Demyan
Tom Demyan
Reputation 180
#2 tenspeed
tenspeed
Reputation 140
#3 GMUNDBOY
GMUNDBOY
Reputation 110
View All

Related Models For Sale

Used Audi A4
293 Great Deals out of 10,505 listings starting at $1,200
Used Ford Mustang
541 Great Deals out of 45,846 listings starting at $1,999
Used BMW 3 Series
945 Great Deals out of 30,262 listings starting at $1,000
Used Porsche Boxster
45 Great Deals out of 1,146 listings starting at $3,920
Used Chevrolet Corvette
149 Great Deals out of 20,684 listings starting at $3,995
Used Chevrolet Camaro
243 Great Deals out of 31,194 listings starting at $369
Used Mazda MX-5 Miata
43 Great Deals out of 3,935 listings starting at $2,985
Used Audi A3
72 Great Deals out of 5,819 listings starting at $2,376
Used Porsche 911
91 Great Deals out of 4,513 listings starting at $10,500

Used Cars For Sale

2017 Audi TT For Sale
234 listings starting at $38,815
2016 Audi TT For Sale
3 Great Deals out of 62 listings starting at $34,995
2015 Audi TT For Sale
14 listings starting at $29,986
2014 Audi TT For Sale
3 Great Deals out of 31 listings starting at $19,888
2013 Audi TT For Sale
18 listings starting at $23,800

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.