Yeh I know a guy who owns a Mondeo and carries a roll of black insulating tape in the car - every time a warning light comes up he sticks a bit of tape on the display - I've seen his dash with more spots than a dalmation.
I should have done that on my 1990 Mk II Astra. I got about 20K trouble-free miles out of it from new, and then the
warning light came on. It would do it at least once every few weeks, seemingly at random. The
never stored a fault code, and the dealer had the bare faced cheek to practically call me a liar.
In the early days, I'd do what the manual said and stop the car. After a while, I just started to think "Well it's still under warranty and the dealer's been told repeatedly. If it blows up, it's their problem."
Not that I was ever sure what the
did on this car, as the engine still ran using the good old carburettor and distributor. The
did function as a rev limiter (cutting the spark if you revved it too high, which was handy as the car didn't have a rev counter) but apart from that, it seemed to do absolutely nothing apart from light the little yellow light.