I have a 2012 xf. Recently the check tire pressure warning has been coming on and each time I have had to add about 2 pounds to each tire to bring them up to 36 pounds. It seems odd that all of the tires would be losing pressure at the same time. I know that on some other current car makes, when you get new tires they service the tpm's by replacing the valve stems. Can the jaguar tpm's be serviced? Do you think that is the problem?

 

How often are you having to air up?..if it is frequent then go have your tires remounted...When you replace tires, as a general rule, they put in new TPM x-mitter units in each tire as they have batteries and get weak after time...IMO a MY12 tire x-mitters should be good for at least 5 years.

 

Hard to say but tires do lose about 1 psi air pressure per month.
Was it several months between adding air?
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No, I would say that it was about 2 weeks. And all 4 tires needed air. I could possibly see it if it was winter when tires tens to lose more pressure, but the temperatures have been 80 to 90 degrees.