2002 Escalade 6.0 awd - c0286

I got a c0286 code which sets after driving the vehicle forward a short distance, I read the online articles and installed a new mpa switch. Now it takes longer for the code to set and the sss light to come on but it's still there, so either it's not fixed (most likely) or I need to do a mpa bleed.

Is the bleed necessary? Or is my ebcm bad?