I have a p-reg punto 55, and recently the speedo stopped working. I
took it to my local garage where they fitted a new sensor.
Since then the speedo reading has been wrong, giving a reading of
40mph when I'm doing more like 50. It's as if it's calibrated wrongly.
The garage told me there is only one type of sensor for a punto and
there must be a problem with the speedo head. So they fitted a new
speedo head but this has made no difference. They are now muttering
something about the gears but I'm not convinced they know what they're
talking about. Any suggestions?