Tyre pressure system going haywire in cold weather.

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ging353

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MG ZS EV
Has anyone had problems with the Tyre Pressure monitoring system going haywire in the cold weather on the new MG ZS EV facelift.
 
Not yet but I did have to pump the tyres up to there 2.8 as was showing 2.6 with the colder temps
 
I just pumped up all 4 tyres today evening. One had gone down to 2.5 rest were between 2.6 and 2.7. Made them all 2.8
 
N2STY said:
Not yet but I did have to pump the tyres up to there 2.8 as was showing 2.6 with the colder temps
Click to expand...
I have found that the TPMS readings, can be a little erratic and shift about a bit, until they settle down again.
They are pretty temperature sensitive, thats for sure.
I had a TPMS warning flag up about two weeks ago, i checked and readjusted all four tyres and checked the readings with three different tyre pressure gauges.
I got all three of them all to read within 1 PSI on each gauge, so they where reporting consistently.
Turned on the car and the TPMS displayed a very slight difference in bar pressures in the car and so did the App.
The following day, before the car had moved, I checked the App again and all was reading 2.8 Bar.
I have just checked again on the App ( this is about a week latter now ) and they are all still at 2.8 Bar.
I will try and insert a photo just taken from the App.

Tyre pressures IMG_8431.PNG
 
Don't lose sight of the fact that actual tyre pressure will change with temperature and this won't necessarily affect all tyres equally.
 
Mine has been at 2.8 after I filled it up last night
 

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I have been checking in on the App today, with regards to tyre pressure reports and I will uploads the pictures that show the slight variations in what is reported.
I believe the ambient temperature is naturally affecting the small fluctuations.
The car has not moved all day.
The time of these snap shots can be seen in the top left hand side of the screen.
I am not at all concerned by this to be honest.

C743D91D-F4AC-493F-8156-DF9A323950C3.jpeg


FFB7A57D-B9E8-4C71-91CD-852C9904B274.png



956B7E32-0F35-429F-8F56-8EA225F39BF8.jpeg
 
2.8 Bar or 41 Psi if you prefer.
The tyre pressures can be seen by opening the drivers door, then below the striker plate on the “B” post, there is a sticker with the important details of the car.
Like VIN number / colour code / tyre pressures etc etc.
 
As soon as it reaches 2.5 the car will start to alert on it. Thats how I realised that mine was low last night and unlike other cars, the TPMS is quite quick in detecting the latest tyre pressure. As I was filling it up, it was updating almost instantly.

Past cars I had, I had to drive the car for a few miles for the system to detect the new values
 
apzs said:
As soon as it reaches 2.5 the car will start to alert on it. Thats how I realised that mine was low last night and unlike other cars, the TPMS is quite quick in detecting the latest tyre pressure. As I was filling it up, it was updating almost instantly.

Past cars I had, I had to drive the car for a few miles for the system to detect the new values
Click to expand...
The ZS EV Gen 1 is like that, but the Gen 2 appears to reset the TPMS fairly quickly after booting up the car.
Unless you disconnect the battery, then it needs do the relearning process.
It will read four dashes on the read out screen, until you have covered a few miles.
 
Lovemyev said:
The ZS EV Gen 1 is like that, but the Gen 2 appears to reset the TPMS fairly quickly after booting up the car.
Unless you disconnect the battery, then it needs do the relearning process.
It will read four dashes on the read out screen, until you have covered a few miles.
Click to expand...
Oh okay, I had a 2021 Kona Ultimate EV, 2022 Ioniq EV and 2020 DS3 EV. None of those updated as fast as this. Needed a few miles driving. This car amazes me everyday.
 
apzs said:
As soon as it reaches 2.5 the car will start to alert on it. Thats how I realised that mine was low last night and unlike other cars, the TPMS is quite quick in detecting the latest tyre pressure. As I was filling it up, it was updating almost instantly.

Past cars I had, I had to drive the car for a few miles for the system to detect the new values
Click to expand...
If you had not long driven it, the TPMS sensors may have still been "awake".
 
apzs said:
Apologies but not sure I understand what you meant there
Click to expand...
The sensors go into standby after a while, and are woken up when the wheels rotate. But see N2STY's reply above.
 
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