Fuel gauge reading wrong (fixed it!)

[MrTurner]

I'm confussed by this one..  The fuel gauge was showing 1/4 tank, so I went and put £30 in.  I'd expect that to be about half a tank in today's climate?

Got back in, started it up, still 1/4 tank?  I've read the sender is attached to the pump (usually in the boot), and can pack up, but I would have thought the gauge would show 0?  I've given the dash and the clocks a bit of a whack and it won't budge.  Thought about fuses/relays, but again, thought that would show 0 on the gauge?

Over to the experts....  Anyone?

[MrTurner]

Argh - fixed it 

I've spent about 2 hours fvcking about with it.  As I've had the gearbox off, the speedo sensor seems to have confussed itself.  So, a simple 'press trip and hold while starting the car' fixed it.  Happy days...

[eightyeightmph]

'Press trip'?

Which button is that then?

[MrTurner]

The one on the left, by the miles, the one that gives you the trip reading?

[eightyeightmph]

That fixed the fuel guage? How random! If only I was so lucky!!