sometime the reading may show err with beep sound. means errors.
if ok it will show the reading with number
if show err, hv to properly insert the head of the pump into your tyre valve and try again
cheers
Juz wanna share my similar experience...my old ride I used the electronic pump at shell petrol, used to be the manuel turning of type pressure type, it reads error during my tyre pumping...I ignored the err message and drove off....after driving for awhile, the tyre that read error was flat & I had to change to my spare wheel....cos i dragged the flat tyre for a distance, hence the tubing spoilt....an expensive lesson learnt to properly pump using the electronic pump...
