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    Re: How accurate is TPMS?

    Quote:
    Alex_ said:
    Quote:
    Alex_ said:
    Whether or not it actually recalibates the sensors whilst it is learning I don't know. However, I set the tyre pressures to be 33/39 front/rear from cold at home this morning, then reset the TPM, then went for a drive. When the readings came back up they were 33/39. They were not aligned before I did the reset!!



    Quote:
    fritz said:
    No, it just relearns how to recognize the transmitters of the individual wheel sensors.



    Possibly a coincidence then



    Well, since you were aiming for 33/39 you did assist the concidence. (The air temp in the tires when you set the pressures must have been close enough to 20*C. Warm January day in the UK? )

    Re: How accurate is TPMS?

    They didn't say 33/39 directly after I added air today (ie. before I reset the TPM and before I went for a 10 min drive). They said higher than that!

    It was about 5 degrees C when I added air.

    ...so the tyres must have heated from 5 degrees to 20 degrees in 10 mins on a cold day and gentle driving?!

    Re: How accurate is TPMS?

    It's further complicated because tyhe actual pressure readings aren't updated very often compared to the 'info' pressure figures.
    The system is set up to report pressure loss very quickly and the 'info' figures are very nearly 'live', but pressure increases as such take w hile to display.

     
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