I have a p0122 code I can not get rid of for nothing. It's a 2000 trans am with a 6.0 stoked a 408 Procharged. I've tried different throttle bodies checked the voltage voltage reads 5v while opening the the throttle body it reads 4.5vs currently have fast 92 with a holley ultra low ram. What can I check next? Or does this need to be tuned out?