You need to investigate left front sensor. If the corners are all deflated, the sensor values should be similar.

Running no fuses suggests wiring cross wire somewhere like a subwoofer tapping power and back feeding a circuit downstream of the fuse.

It does look like the correct fuses pulled. I would pull the relay it must have one.

Does it shut off when you remove the key or have to pull the battery cable?

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)