Low tyre pressure warning won't reset

adonlan · Jan 20, 2023

Hi, I've just purchased a 2018 Vitara sz4. The tyre low pressure warning came on but now won't reset despite the pressure being above the recommended amount. I've inflated the tyres to around 35psi and driven for over 40 minutes but it still gives a low pressure warning. With the warning on I can't get into the tpms menu. The rear two tyres are flashing but the front two have a solid display. The temperature has been cold but not ridiculously, around 0 to 2°c.

Any other ideas?

Thanks

martin1977 · Jan 20, 2023

is it possible the batteries are getting low????? you could try changing the TPMS from economy to comfort and see if that resets the warning..
if it resets.. then its not the batteries!

adonlan · Jan 20, 2023

martin1977 said:
is it possible the batteries are getting low????? you could try changing the TPMS from economy to comfort and see if that resets the warning..
if it resets.. then its not the batteries!

You access the tpms from the right hand knob on the dash? On my car this is not going into the menu, it just goes blank. I suppose the battery could be low, I'll check that.

clairevitara said:
Happens to me with my 2016 Allgrip every time it gets cold. I set them to 36 and it goes away eventually.

Ok, I have them set to 35. I'll increase the pressure to 36. Do you then reduce the pressure?

clairevitara · Jan 20, 2023

Happens to me with my 2016 Allgrip every time it gets cold. I set them to 36 and it goes away eventually.

2013GV · Jan 20, 2023

Over inflate by at least 5 psi over max setting, so about 40 until light goes off (probably 4 to 5 miles) then adjust to desired settings, remember cold tyres can be up to 10% less than hot so re check when cold.
TPMS batteries usually last about 10 years, then the units in the rims need replacing

clairevitara · Jan 20, 2023

I don’t decrees them no. What usually happens is they are flashing at say 29 or 30. I use the air machine and select 36 and fill them up. Then I get in the car and drive for a little while and it either stops flashing straight away or within 10 mins and I forget about it until it gets cold again and we go through the same process again. Usually twice a year.

BarnsleyRob · Jan 20, 2023

After you top up at the air machine, drive a little way (less than a mile will do) park up and read the actual pressure that the TPMS thinks they are via the menu. If they’re a country mile apart, invest in a pressure gauge and set your pressures to what shows the most accurate reading. Forecourt air gauges are notoriously inaccurate.

2013GV · Jan 20, 2023

I agree totally, never trust a forecourt gauge. Go buy a decent gauge and use that. Even if its nit totally correct, you will know what's right on that gauge in relation to your vehicle

Low tyre pressure warning won't reset

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