Get some soapy water like you are doing the dishes but stronger & cover the valve with it. if you get bubbles you have an air leak.
If you can you can also check the bead (area where the tyre meats the wheel) for leaks, you may need to take the wheel off and lay it flat so there is liquid say in the bead area.
If want to keep looking, put enough water in your bath or water tank to cover the lower part of your tyre and slowly rotate looking for bubbles. if you have a puncture in the tyre this will show up also.
Iandee wrote: ↑Tue May 09, 2017 6:10 am
I have a slow pressure loss on one wheel. No damage seen. Is it possible that the TOMS valve can leak?
gvmdaddy wrote: ↑Tue May 09, 2017 7:33 am
There is no requirement to reset or recalibrate. Yo can do so however in severe temperature changes if needed. They are not intended to be highly accurate, usually to a tolerance of +/- 1 to 2psi. They are more intended to alert you to a loss of pressure as opposed to the actual set pressure.
But are still classed as a fail on the MOT if the warning light is on
rod9669, your last comment above got me thinking! You are correct that if the system doesnt work then it is an MOT failure, but how exactly is the system checked? The system only registers on all four wheels when the car is driven for approx 1/4 of a mile. Do MOT centres now take all vehicles out on the road? If so, is your car insured? If they dont drive your car then how else can the system be checked?
My tpms has developed a leak and there does not hold the pressure in the tyre. Can a kit solve this problem or will it need a new tpms unit fitted . If so will a unit off the internet be ok ? Or is it a trip to the dealer ship. Any help welcome.