Tyre pressure warning inaccurate

[Tone68]

Apologies if there's already a thread for this, but I couldn't find it in a search. Has anyone else had this issue? I've just inflated my tyres as the warning (rightly) reported them a bit low. My problem is that it's still warning me they are low when I know for a fact all tyres are inflated to the recommended pressure. Its' a minor irritation, but what's the use of sensors if they're inconsistent and unreliable?

 

[Gadget Geek]

You sometimes have to drive around for a bit for them to recalibrate.

Search for "TPMS".

TPMS fault when switching back to summer tyres.

Hello When i changed to the winter tyres i bought from MG, i had to go to the dealer to get the TPMS programmed because i was getting a tpms fault. Today i changed back to the original summer tyres and i am getting a TPMS fault again. Does anyone know if i would get the error if the tyres are...

www.mgevs.com

 

[Chris H]

I had a couple of journeys where it was reporting low pressure, but the tyre pressure screen showed them as normal. It just went away after a couple of days; no idea what caused it.

 

[fred12345]

pressure also depends on the outside and tyre temperature, not by much but it does ...

 

[fnegroni]

I just checked the workshop manual.
The TPMS sensor in each tyre reports tyre pressure and tyre temperature
The system then determines if it’s low pressure, rapid leakage, high temperature, high pressure, axle tyre pressure.

So in the case above where two tyres on the same axle have substantially different pressure, maybe that’s why the alarm is triggered.

Same in the case where tyres are possibly under inflated and then as they roll, they overheat and their pressure goes up, but only because of overheating.

Maybe not all conditions are reported correctly in the instrument panel.