A few month ago I "found" a screw with my tire. The TMPS came on and the difference was 0,5bar. I had just changed to summer tires the week before so at first I just corrected the pressure in all tires and went on. The next week the TMPS triggered again and the difference was the same 0,5bar. So I guess thatīs the trigger difference for the system.
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XC90 AWD D5 Momentum
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