Tyre pressure warning light

bakerdave

Novice Member
Joined
Sep 30, 2025
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Location
Penarth
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MG3 Hybrid+
Another newbie question - what are the tolerances on the tyre pressures ? Today, drove to get petrol and noticed on the way back, that there were alarm symbols up. Stopped in a layby to consult the (enormous) manual to find that the right front was showing 2.4 bar . Just wondering whether to pump up to 38psi but will that alarm high ? The readout is showing 2.4 bar on the right rear but no alarm!
 
Another newbie question - what are the tolerances on the tyre pressures ? Today, drove to get petrol and noticed on the way back, that there were alarm symbols up. Stopped in a layby to consult the (enormous) manual to find that the right front was showing 2.4 bar . Just wondering whether to pump up to 38psi but will that alarm high ? The readout is showing 2.4 bar on the right rear but no alarm!
Hi, mine came on last week when it was very cold. I inflated all to 37psi and after driving a short distance, the warning switched off. All still OK and showing 37.8 psi on all four tyres. The warnings remain in the iSmart app until you delete them.
 
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