TPMS calibration issue

[Roro]

I’m using aftermarket TPMS sensors which are about 1 year old. I can’t remember the brand (Hamilton?), but I saw them on a thread here once, and others here have used them successfully

I noticed a while ago that they consistently read 5/6 PSI lower than the tyres really are, like today they were saying my fronts were 24 and when I checked with a digital gauge the reading was 29

Resetting the TPMS on the cars dash (“Process complete!”) doesn’t fix the issue. Are these sensors just ***** or is there a way to recalibrate them to give the correct readings?

 

[911UK]

Can’t recall if there is an option in PIWIS to do this, do you still have the frequency codes when you installed them?

 

[Roro]

I might do I’ll have a look, thanks. I think they were 433mhz, is that what you mean?

 

[T8]

I’m using aftermarket TPMS sensors which are about 1 year old. I can’t remember the brand (Hamilton?), but I saw them on a thread here once, and others here have used them successfully

I noticed a while ago that they consistently read 5/6 PSI lower than the tyres really are, like today they were saying my fronts were 24 and when I checked with a digital gauge the reading was 29

Resetting the TPMS on the cars dash (“Process complete!”) doesn’t fix the issue. Are these sensors just ***** or is there a way to recalibrate them to give the correct readings?

I've just purchased a set of Hamaton after market sensors. They are 433 MHz. They'll be fitted when I change my tyres in a few weeks time.

 

[Roro]

Keep us posted on your findings re accuracy!

 

[T8]

Keep us posted on your findings re accuracy!

My tyres are set accurately at 34 front 40 rear.

The in-car reading from my newly fitted Hamaton after-market TPMS sensors show 31 and 37 so 3 psi low on all four wheels.

I'm not happy about the situation but at least I know what the discrepancy is and can monitor changes as necessary.

 

[Roro]

Good to know. The other day I got a 24PSI “Add air!” message, and when I checked with a tyre gauge the tyre had 27.5

I just bought a dual cylinder foot pump, I find it less hassle to add a couple PSI if needed than a compressor