On one of my Lupo 3Ls I have been having a red flashing P symbol in the centre console just above the handbrake (no beeps). This only flashes when I stop the car with the gear selector in Stop. If I stop by moving the selector to Stop this red P light flashes. If I put the car in N and turn off with the key, no flashes, but once I then move the selector to Stop, it flashes. It is as though it is warning me to put the handbrake on. However, when I apply the handbrake, the handbrake symbol lights up on the speedo, confirming handbrake on, so it is not the handbrake switch (unless there are two), but the P light still flashes. Maybe the transmission controller thinks the gearbox has not shifted into Park properly (but it has it is in gear).
I have checked the transmission fault codes, there are none, and the ABS fault codes, again none.
This strange flashing started about a year ago, and I had been ignoring it, as there were lots of genuine issues needing attention, an airbag light, rear brake shoes, plus a leak starting from the gangsteller lower seal. This month I gave the car a good going over, new brake shoes, airbag slip ring, changed the lower seal on the gangsteller, checked for leaks (none), did the basic setting which threw up a faulty potentiometer on the gangsteller (replaced the potentiometer, basic setting again). Also just replaced an inner driveshaft triple joint which had play in it. It was running with all these faults, and now they are fixed the flashing remains. It does drive very nicely now, I can tell the difference, but it won't pass a Swiss inspection with the flashing P... Any ideas please?