What scanner are you using as usually there is a subcode i.e c1a00-47?
Normally when the red light is on with arrows both ways above it, that indicates the vehicle is in calibration mode, with your scan tool can you calibrate the suspension or see if you can put the ECU back into normal suspension mode or view what mode it thinks it is in?
What happens if you try and raise/lower suspension and are there any warning messages or other lights in the display of instrument panel?
Neil
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