> My airbag light on my Xantia has been flashing occasionally over the
> past few months. I say occasionally. as when I fiddle with the wiring
> under the driver's seat, it goes out for a while (say, a few weeks)
> then finally starts flashing again. If I knew which wire it was
> causing the problem, I coiuld probably fix it. Any ideas?
You've already identified it...
It's the connector under the seat for the belt pretensioner.
> Also, my engine auto diagnotic light came on today.
I'd personally just clear the codes - either just keep using the car, and
any temporary codes will be cleared after a while, or disconnect the
battery for half an hour or so - and see if it comes back. If it does, get
it read out.