I've been going stir crazy w/this issue and hope somone can breack it down for me to better understand. I have no other codes.

P1656 Wastegate PWM solinoid driver circuit failed,
number of 'open' or 'short' faults detected=2 sets code,
wastegate PWM output voltage @ PCM does not follow s/w command.

What does this exactly mean, and what should I be doing to fix it?

HELP!