Aargh... please help....

[Jaffa]

The fuel gauge on my A3 TDI (01') has been reading oddly for a while, when the tank is full the gauge shows 3 quarters and when there is approx a quarter tank left the gauge shows empty.

I have replaced the Fuel Level Sender unit, filled the tank and the gauge still shows 3/4's so its made no difference.

Can anyone suggest any other solution??

Its not exactly a major problem just an annoying one.

Thanks, Jaffa.

 

[Olly_K]

when you say the fuel sender unit, do you mean the float in the actual tank ?

 

[SanityClause]

Dunno if the TDi has the same setup as the S3, but the S3 has 2 senders in the tank.
Mine did the same thing, wrong readings etc, I believe it was kinda commonplace.

 

[Jaffa]

Hey guys,
Yeah the actual float and sender that sits on top of the tank, the only other thing im thinking is a breakdown in the wiring between the sender and the gauge???
Saying that the gauge seems to be reading a bit more acurate now so I guess ill see how it goes.

Cheers.

 

[neil.c]

The problem could be with the dashboard

 

[Peloton]

I've noticed that when I fill my tank up to the brim, the gauge takes a while before it goes to the full mark. Can be 5-10 minutes driving sometimes! I've only just noticed it as I've always previously filled to just over half, as a full tank is unnecessary weight. I've got to travel up to Glasgow to get V-Power these days so get a full tank since I'm travelling so far.

 

[jojo]

I've noticed that when I fill my tank up to the brim, the gauge takes a while before it goes to the full mark. Can be 5-10 minutes driving sometimes! I've only just noticed it as I've always previously filled to just over half, as a full tank is unnecessary weight. I've got to travel up to Glasgow to get V-Power these days so get a full tank since I'm travelling so far.

Mine goes straight up on start up after a fill, no delay at all?!

 

[Jaffa]

Hey guys,
Cheers for all the help.
My gauge seems to be erratic, i.e straight after a fill it will read 3/4 full. Then after 10-15mins of driving it may creep up to full.
Next time I start the car it may read just under 3/4 full??????

It definately aint the sender or wiring on top of the sender... so Im at a loss.

Oh well just have to put up with it I guess.

Thanks again.

 

[mattyboy199]

Mine goes straight up on start up after a fill, no delay at all?!

Mine to

 

[jojo]

Infact, as a bit of a tester, I got my other half to fill my car up with the keys still in the ignition, but not running. The fuel gauge goes up as the fuel is topped up, so it's instant!

 

[Jaffa]

Have done a full search on here and a few posts mension a second fuel level sender??? Anyone know if this is right?

Could it be something else? i.e faulty fuel gauge?

I know its a minor fault but it is really annoying and I would like to get it sorted.

Thanks again.

 

[Jaffa]

Ok guys,
After a diagnostic check at Audi today it brought up what may be the problem:
00668 053 - on board voltage, terminal 30 voltage supply too low sporadic
00771 050 - fuel gauge sender - G open circuit/short circuit to positive sporadic

Would these point to the problem? Or is it just the computer seeing that connections have been removed i.e when I changed the sender unit?

Thanks in advance.