[allanv]

I have 225/35R19 Y | Rear: 255/30R19 Y

Today I pumped them up to 35 & 37 20 minutes later got a pressure warning light.
Went home parked in the garage and waited 2 hours before raising the pressure to 40 / 42 as research had led me to.

The warning came back instantly.

Could or have I put too much air in or could it be a fecked sensor?
Checking from today and tonight the pressures remained constant.

I did however not check what the garage put in after they changed all 4 tires for NRF.

I think I have been proactive and got it wrong.

Thanks again for the assistance.

[beto17]

Originally Posted by allanv

I have 225/35R19 Y | Rear: 255/30R19 Y

Today I pumped them up to 35 & 37 20 minutes later got a pressure warning light.
Went home parked in the garage and waited 2 hours before raising the pressure to 40 / 42 as research had led me to.

The warning came back instantly.

Could or have I put too much air in or could it be a fecked sensor?
Checking from today and tonight the pressures remained constant.

I did however not check what the garage put in after they changed all 4 tires for NRF.

I think I have been proactive and got it wrong.

Thanks again for the assistance.

Did you reset your tmps in your idrive??
Every time you adjust your psi on your tires you have to reset it

[hp88]

I just stick to what it says on the inside of the door but your PSI (35 and 37) sounds similar to what I'm running. I had a random warning appear the other week, pressure seemed OK so I reset the warning and carried on driving as normal. I have got a faulty speed sensor so I think that was most likely the cause of my warning.

[allanv]

Originally Posted by beto17

Did you reset your tmps in your idrive??
Every time you adjust your psi on your tires you have to reset it

It is a 58 so no iDrive on this one but yes I did reset the TPMS.

Forgot to add these are NON RFT and the door references RFT.

[abeardo83]

Adding air does trip them - seen it on the girlfriend's 325d, and my E89 and E92. Sometimes they do the same if you remove a wheel.

Just reset and go for a drive afterwards. Should be fine. You should always try and do your tyre pressures at stone cold too.

[Wavey 335i]

If you have MV4s, get the rears looked at as they tend to crack.

[allanv]

Seems I added to much, lowered it and reset the TPMS and all has been fine for the last 3 days.

Thank you again for the help.

[ed330D]

IIRC, there's no dedicated tpms sensors on an UK E92. The system uses data from the ABS and monitors for a relative change in a wheel's rotation speed.

The weakness in this method (compared to in-wheel sensors) is that if all the wheels drop pressure at the same rate the system doesn't pick it up.

[half Colin]

Originally Posted by ed330D

IIRC, there's no dedicated tpms sensors on an UK E92. The system uses data from the ABS and monitors for a relative change in a wheel's rotation speed.

The weakness in this method (compared to in-wheel sensors) is that if all the wheels drop pressure at the same rate the system doesn't pick it up.

Yeah, that's a major issue if you drive over a stinger because you won't know that your tyres are punctured! 😂😂😂

[Fundguy1]

Originally Posted by allanv

It is a 58 so no iDrive on this one but yes I did reset the TPMS.

Forgot to add these are NON RFT and the door references RFT.

Doesn't matter. Do what the door says pressure wise. High pressure sets it off just like low pressure.

[Digitalize]

The TPS system as mentioned is based off the ABS rings and wheel rotations. It only compares on the same axle. It doesn't know if it's too high or too low, just roughly a 10psi difference.

It will be more sensitive if you replace one tyre but not the other as obviously that effects the radius too.