Seeking help from the car enthusiasts

This?

Yes.

My front left tyre has an ongoing slow puncture, which my tyre guy can patch up; free.

However, this was the case for the past month; or so.

Mine goes off very early it only has to lose a little pressure. It doesn’t actually measure it, it just assumes you’ve pumped up to a particular psi and then monitors the drop. If it stays on after I’ve pumped up it usually means I haven’t reset it properly. I have to drive 10miles in a mostly straight line to recalibrate after (I don’t drive a Vauxhall though but that’s a reason mine comes on when it shouldn’t after pumping up)

Mine goes off very early it only has to lose a little pressure. It doesn’t actually measure it, it just assumes you’ve pumped up to a particular psi and then monitors the drop. If it stays on after I’ve pumped up it usually means I haven’t reset it properly. I have to drive 10miles in a mostly straight line to recalibrate after (I don’t drive a Vauxhall though but that’s a reason mine comes on when it shouldn’t after pumping up)