We had this come up on ours the other day as the summer temperatures started to drop - as soon as I topped up the offending tyre (low by 0.1 bar) the TPMS picked this up and resets itself, nothing for us to do.
Had a strange TPMS warning experience today.
We left our local supermarket today and about one mile down the road, the yellow TPMS bong warning was triggered and in turn, left the yellow tyre symbol displayed on the drivers binnacle.
Close by, was a empty lay-by.
I scrolled through the menu's, to see that the car was indicating that there was a problem with the N/S/F tyre pressure.
I jumped out of the car, expecting to see the tyre had deflated, but it looked fine ?.
It was raining cat's and dog's, so I returned to the car.
The car was still in the READY mode and we just sat there a while waiting for the rain to ease off.
A couple of minutes latter, we received another TPMS warning to say that the N/S/R tyre had a problem !.
Two minutes latter, it triggered a warning for the O/S/F tyre, then finally the N/S/R tyre.
All four tyres had a problem according to the TPMS system.
We had not run over a police stringer on the way back from our weekly shop, so what the hell is going on !.
Returned home and did a quick visual check on the four tyres, all looked visually okay.
Powered down the car and left it for about one hour, while we unpacked and had a bite of lunch.
Returned to the car and put the car back into READY mode.
It picked up the TPMS warning straight away.
Powered down the car and did tyre by tyre pressure check.
Each of the tyre's checked revelled it was about 2.0 PSI down, on the recommended pressures.
But the N/S/F ( where the first trigger started ) was nearly 3.5 PSI down on the pressure recommended.
I then set to work topping up all four tyres.
It was a bit hard getting the valve caps removed, as they are very recessed and hindered by fouling the edge of plastic wheel cover.
When complete, I jumped into the car and booted into the READY condition, as I intended to take the car for a short drive, in order to recalibrate the TPMS settings.
As soon as the car hit the READY state, the TPMS display was still displaying in the binnacle, but I could now see the new increased tyre pressure settings on the four wheels.
I was just preparing to drive away, there was another bong and the yellow TPMS warning light symbol had been removed from the binnacle, to be replaced with "All systems okay" and a blue smiley face symbol being displayed.
So, as
@JohnInFrance states, the TPMS had appeared to reset itself, with out moving an inch.
I have not had to use the car after this morning, so hopefully it will be okay the next time I use it.
It was really odd how that initial N/S/F warning, triggered off a chain reaction on the remaining three other tyres ?.
It would appear that all of the tyres where a little down to the recommended pressures, but this could be down to the colder weather.
The N/S/F tyre DID have a 2 PSI discrepancy over the other three tyres, maybe THIS was the trigger point.
On previous VAG cars I have owned, the TPMS system works via the ABS system and not like the MG system, where it has an individual sensor in each wheel rim.
On the VAG system, it will detect if one of the tyres is under inflated, or has about 2 - 2.5 Psi discrepancy to the other tyres.
This may suggest, that the MG system has a similar tolerance level ?.
I know from personal experience, if you disconnect the 12 volt battery on the ZS EV Gen 2 it will in turn, lose all recorded readings from the TPMS display altogether.
It just displays two dashes on each of tyre read out displays.
Then a short drive IS required to restore the readings back again.
Edit :- Forgot to add, that ALL of these TPMS warnings, where sent to the iSmart App on my phone, so it works in that respect.
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