TPMS Alert When Tyres Warm

[MakaveliX]

Went for a long drive and towards the end the TPMS alert came on.
Got out the car and checked all of the tyres and they had increased by 2 to 3 psi obviously because they increase when hot.

Is there any way I can prevent it coming on when the tyres warm up ?

I have a button which locks the current pressure and resets the light but then surely it then sets the standard level at the higher PSI from being hot and will then come back on again when cold

Thanks

Edited by MakaveliX on Wednesday 12th October 13:29

[Scrump]

Is this a factory fit tpms or aftermarket system?

[vikingaero]

Some cars are worse than others for false alerts.

The TPMS with a pressure sensor in each wheel are on the whole fairly reliable and you can normally see on the dash what the pressures are.

The TPMS that use the ABS sensor to measure are on the whole poor. Look up Honda Jazz TMPS and there are lots of irate Honda Jazz owners complain about false alerts. I have a tyre pressure gauge in each car to check for crying wolf.

[MakaveliX]

Scrump said:

Is this a factory fit tpms or aftermarket system?

Factory fit, it's a Mazda 3

[Scrump]

Have you checked the tyre pressures when cold and made sure they correct; then gone into the menu inside the car and reset the tpms so that is the baseline from which it measures? (Assuming yours is a wheel speed based system).

[MakaveliX]

Scrump said:

Have you checked the tyre pressures when cold and made sure they correct; then gone into the menu inside the car and reset the tpms so that is the baseline from which it measures? (Assuming yours is a wheel speed based system).

Yeah I did that this morning. 6AM when it was cold out and hadn't been driven since yesterday.

Problem is, it seems to come on when the pressure goes down OR up by 3psi

[vikingaero]

Tyres will naturally heat up and there will be an increase in tyre pressure. The problem is when one does not heat up uniformly and this triggers the TPMS warning - which is why I advocate carrying a tyre pressure gauge - the stick ones are ideal for this.

I find this happens more frequently on long stretches of bumpy roads where the ABS rotation makes the distance covered by each wheel substantially different. I had an alert in the Jazz when the temp was 38C. The tyres read 38psi (inflated to 33psi) and one was on 41psi.

[MakaveliX]

vikingaero said:

Tyres will naturally heat up and there will be an increase in tyre pressure. The problem is when one does not heat up uniformly and this triggers the TPMS warning - which is why I advocate carrying a tyre pressure gauge - the stick ones are ideal for this.

I find this happens more frequently on long stretches of bumpy roads where the ABS rotation makes the distance covered by each wheel substantially different. I had an alert in the Jazz when the temp was 38C. The tyres read 38psi (inflated to 33psi) and one was on 41psi.

perhaps so,
the rears were both 36.
front driver was 38
front passenger was 37

[E-bmw]

Not sure if this is the right chart for you, but are you sure you are using the correct pressures?

https://www.tyre-pressure.co.uk/pressures/mazda/2

[Tony1963]

E-bmw said:

Not sure if this is the right chart for you, but are you sure you are using the correct pressures?

https://www.tyre-pressure.co.uk/pressures/mazda/2

Lol. It’s a Mazda 3, your link is for the Mazda 2.

[andburg]

How hard were you driving?

With getting an alignment check aswell as too much toe in will scrub the front tyres and cause excess heat/wear

[Pica-Pica]

MakaveliX said:

Went for a long drive and towards the end the TPMS alert came on.
Got out the car and checked all of the tyres and they had increased by 2 to 3 psi obviously because they increase when hot.

Is there any way I can prevent it coming on when the tyres warm up ?

I have a button which locks the current pressure and resets the light but then surely it then sets the standard level at the higher PSI from being hot and will then come back on again when cold

Thanks

Edited by MakaveliX on Wednesday 12th October 13:29

Set the tyres by gauge when cold, drive about 5 miles, and then press that reset button. The tyres should be half-warm, and in-between the cold and hot pressure. If that doesn’t work, start again from cold, but maybe drive 10 miles or so and reset. You shouldn’t have to do all that - but you know your tyres are OK when cold.

Question. Do you have true direct TPMS system, with valves in the wheels, and a read out for all wheels in the cars system? Or is it an indirect TPMS using ABS ring rotation speeds?

https://en.wikipedia.org/wiki/Tire-pressure_monito...

Edited by Pica-Pica on Thursday 13th October 01:04

[MakaveliX]

That sounds like a good idea, I'll give it a go.

The second one I think. From what I know, the valves are standard and I cannot see the readings on the car infotainment, it just alerts me when there is a fluctuation

[E-bmw]

Tony1963 said:

E-bmw said:

Not sure if this is the right chart for you, but are you sure you are using the correct pressures?

https://www.tyre-pressure.co.uk/pressures/mazda/2

Lol. It’s a Mazda 3, your link is for the Mazda 2.

Sorry, misread you.

[E-bmw]

E-bmw said:

Tony1963 said:

E-bmw said:

Not sure if this is the right chart for you, but are you sure you are using the correct pressures?

https://www.tyre-pressure.co.uk/pressures/mazda/2

Lol. It’s a Mazda 3, your link is for the Mazda 2.

Sorry, misread you.

In that case, the pressures may still be wrong, the closest to your pressures is 36 all round, which isn't what you said yours were.

https://www.tyre-pressure.co.uk/pressures/mazda/3

[RizzoTheRat]

vikingaero said:

The TPMS that use the ABS sensor to measure are on the whole poor. Look up Honda Jazz TMPS and there are lots of irate Honda Jazz owners complain about false alerts. I have a tyre pressure gauge in each car to check for crying wolf.

Surely the indirect ones should be immune to this problem as they work on the difference in rolling radius between wheels, and as the tyres heat up they should all change by a similar amount. I have this system on my Octavia and never had a problem with it, although I'm guessing it's less sensitive than the Jazz one, it only illuminates when a tyre is down to around 20psi

[MakaveliX]

E-bmw said:

In that case, the pressures may still be wrong, the closest to your pressures is 36 all round, which isn't what you said yours were.

https://www.tyre-pressure.co.uk/pressures/mazda/3

In the owners manual and in the door frame it says 35 front and 33 rear

[E-bmw]

MakaveliX said:

E-bmw said:

In that case, the pressures may still be wrong, the closest to your pressures is 36 all round, which isn't what you said yours were.

https://www.tyre-pressure.co.uk/pressures/mazda/3

In the owners manual and in the door frame it says 35 front and 33 rear

So you are running the wrong tyre pressures then, get that sorted & hopefully after a reset you may well be ok.

[MakaveliX]

E-bmw said:

So you are running the wrong tyre pressures then, get that sorted & hopefully after a reset you may well be ok.

Sorry for the misunderstanding.
I set the tyres to 35 front and 33 back last week some time.

Yesterday whilst driving the alert came on and they'd all increased by 3psi

[E-bmw]

Gotcha.