Rear tyre pressure warning

[RaspberryMan]

Can anyone explain what is going on here. The last couple of journey's have thrown up the 'rear left tyre pressure' warning but as you can see the car is quite happy that all the pressures are normal and equal. I can't even find a way to clear the error to see if it's a transient "one of those things" error.

I'm stumped, any ideas?

 

[Alb]

The correct tyre pressure is 37psi so why not pump them all up to that?

 

[Tight Git]

The threshold may be something like 33.08psi and 3 may be at 33.09 and the other at 33.06 - all 4 will show 33.1 when rounded to 1 decimal place.

As said put a bit more air in all of them and drive it for a half mile or so and they will reset.

 

[bobs2293]

How did you get it to show psi?

 

[Tight Git]

How did you get it to show psi?

Good point - would much prefer PSI instead of Bar and never seen or heard of one showing PSI.

 

[okohll]

How did you get it to show psi?

Would like to know too. I was under the impression the European ones show PSI, UK ones bar and you can't change it, but the OP is in Scotland

 

[MG Clive]

Mine's in kpa, and I can't change it.

 

[GaryMG4]

The left rear seems to be the one that registers first, then 'multiple tyre' warning follows if they are all low but quite often the yellow warning 'sticks' for a while even if all the tyres are the same. My MG4 usually throws the warning when it has been especially cold.

 

[RaspberryMan]

Put air in, all sorted. It occurred to me after Alb's post that it was probably a rounding/threshold thing, still looks weird though.

I changed it to PSI by swiping right from the home infotainment screen, clicking 'settings' and scrolling down a page, it's under 'tyre pressure units'.

 

[Tight Git]

What infotainment version are you running?

 

[RaspberryMan]

Apologies for the delay in replying...

 

[okohll]

Mine's older and doesn't have that, but I look forward to getting it in the next service - another reason to ask for the update

 

[Mainsy]

Mine's in kpa, and I can't change it.

mine too, and I also have no idea how to change it. I have stopped looking now. Maybe something for my next service

my back tyres drop in pressure too in the cold. I would put more air in but after driving for 20 minutes the pressure goes back up, and I do not want to over fill. I just ignore the annoying woman's voice

 

[ReintjeWA]

my back tyres drop in pressure too in the cold. I would put more air in but after driving for 20 minutes the pressure goes back up, and I do not want to over fill. I just ignore the annoying woman's voice

If your pressure change between cold and warm is more than 5 psi (roughly 34 kPa) your tyres are underinflated and flex too much (thus heating up too much and increasing pressure).

I run my tyres at 3.0 bar (300 kPa) when warm, I think they currently sit at about 2.8 bar cold. When I picked it up from the dealership they had it set to 2.7 so I'm pretty content with the pressures I'm running. Wear appears even after about 13.000 km.

 

[RaspberryMan]

Mine's older and doesn't have that, but I look forward to getting it in the next service - another reason to ask for the update

Funnily enough, I did ask for the update, SC007 I believe, although not specifically, only for the fixes it applies... but I have noticed ZERO difference and trying to get the dealer to confirm or deny whether it WAS actually applied is like pulling teeth. Still haven't got a definitive answer yet. I have a feeling they think I'll just go away if fobbed off often enough.