Tyre pressure sensors - cold weather issues?

[Monty]

Tyre pressure sensors all over the shop since the cold weather. They've been fine the last two winters, but having issues this year. Anyone else have these issues?

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[Manders Mustang]

i had them drop HELLA low today, however after about 15mins of driving (crawling) up the A38, it was back to normal pressures.

 

[TimG]

Mine don;t give sensible readings stood in garage, need to drive 1/4 mile to get sensible reading. For this reason don't use them to check static cold pressure, use a good gauge.

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