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Help required with 2006 A6 fuel gauge issues

Discussion in 'A6/S6/Allroad forum (C6 Chassis)' started by decky1968, Oct 21, 2012.

  1. decky1968
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    decky1968 New Member

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    [Oct 21, 2012]
    I have a 2006 A6, 2.0tdi 140,

    after fuelling my car last night, the gauge did not move from empty to full despite having put in 60ltrs of diesel,

    I have travelled 150 miles today with the warning symbol on and the gauge reading empty...with no performance issues.

    is this a common fault?

    what is typically the fault?

    any fault codes to look for with vag.com?

    Thanks in advance,
    #1
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  3. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Oct 21, 2012]
    Strange issue. All I could guess is the fuel sender gauge in the tank is faulty.

    Mine has a similar problem, but that's more down to the mpg and a heavy right foot!
    #2
  4. gupsterg
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    gupsterg Active Member

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  5. Josh84
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    Josh84 Member

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    [Mar 12, 2013]
    Hi, i have a 2005 2.0tdi, was showing empty and 35miles in tank, put 25quid worth of diesel in, when i started car needle didnt move and still showed 35miles left. Pump was definatly dispensing diesel so problem is with car. There was a garage next door and they plugged into it and it said something to do with a solenoid valve on the faults, does anyone have any idea whats wrong with the fuel level reader though?
    #4
  6. MarkyM
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    MarkyM Member

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    [Mar 14, 2013]
    My 07 3.0TDi Quattro has this problem and it's a weird one

    If I have two heavy people in the back it sometimes works (sender units under rear seat)

    However I recently deliberately let the car run out of fuel...it took 20 mins of cranking once 15l of diesel added (priming) and then for a week the fuel guage read fine, after a week it went back to it's empty reading :(

    So mine looks like a combo of issues
    #5
  7. Josh84
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    Josh84 Member

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    [Mar 22, 2013]
    I noticed it happened in mine when my daughter got out of the back, i have since fiddled about with the seat and there was a wire that seamed tp be under the edge of the seat, i pushed this back in and at the next re-fill the needle moved back up. So far the problem hasnt occured again.
    #6
  8. Gunner Bill
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    Gunner Bill New Member

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    [Mar 22, 2013]
    This happened to me with my 2005 3.0 TD. Filled up and the gauge went to zero. After that it was intermittent for a while before I got it replaced. I was told " common fault". I also think there are two gauges as it's a saddle shaped tank. So only one has to fail.
    #7
  9. Josh84
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    Josh84 Member

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    [Mar 22, 2013]
    What did you get replaced? The guy at the garage was on about some sensor that might need replacing but its attached to a pump and the whole thing needs replacing, wasnt sure if he was trying to rip me off or not.
    #8
  10. Ste_Nova
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    Ste_Nova Active Member

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    [Mar 23, 2013]
    mine has this issue, it will show empty after a refill, but after a few miles and a restart all is normal
    #9
  11. Gunner Bill
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    Gunner Bill New Member

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    [Mar 23, 2013]
    I'm sorry I don't exactly remember as it was a year or so ago and I've passed all the receipts on when I sold it. I'm reptty sure it was just the sender unit and not the pump also. Why would you need a pump if the car still runs? I don't even think it's part of the same system, so I would question that.
    #10

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