Rear Suspension Sensor Voltage Readings

[touring_style]

Guys,

I have a 2002 E53.

It sits lower on the left hand side at the rear - (or maybe its higher on the right hand side, I'm not sure).

The airbags are fine - it sits at this level all the time, regardless of if the engine is running or if its been sat for a few days.

The compressor is definitely working.

There are no error messages.

I took a voltage reading using INPA and got the following results;
Rear Left Sensor voltage - 1.9
Rear Right Sensor voltage - 3.4

But which reading is correct, does anyone know?

Is this fault likely to be a bad sensor? - they're giving readings so does that mean they are working?

Or is the fault with the suspension module as it isn't picking up on the fact that voltages are different and it isn't doing anything about it.

I'm NOT getting the "suspension inactive" reading on the dash.

The left hand side isn't completely flat as I can release all air pressure from the left hand airbag and it will reduce further in height. When reconnected the compressor brings it back up to the same wonky level as before.

Its very odd and I'm not sure where to start as there are no error messages.

Any help gratefully received.