Seeking help from the car enthusiasts

If it is the TPMS, you need to correct the tyre pressure and then go into the dash display and reset the fault, some cars have sensors on the tyre valves that actually read the pressure and some work out a low pressure from the ABS system, a tyre with a lower pressure turns at a different speed and then flags up a low pressure.

I normally use a YouTube video to reset as it’s a function the owner normally does, and every car is different. My code reader will only recognise a fault, only top end readers have this function. If your car has sensors attached to the tyre valve then normally if the code won’t clear then a tyre sensor has failed, they have watch batteries in them that eventually go flat, unfortunately they are a sealed unit and a new one will need cloning (learning) to the ecu.

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)

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.

This?