CEL p2009 and low boost

[jtimms6]

I’ve been getting a CEL for code p2009 which is the IMRC and it says the part could be bad or have a bad connection or a bad vacuum line on the part. Has anyone else had this problem or know where and what to look at first? Also I’ve been having low boost getting around 13-13.5 however on the highway if I drop to 5th to pass someone and sometimes even coming out an exit in 4th the car will peak at about 14-14.38 psi. I don’t think I have a boost leak because I can build boost haven’t had the chance to do a boost leak test but I also don’t understand why I’m higher gears I can build more boost? Is the car under more of a load in a higher gear? And does anyone know or think the two issues could be related to each other? Thanks guys let me know what you think.

DC sports cai
Test pipe w stock catback
Stage 1+ 93 octane tune
Cobb AP

[Jeff23spl]

You IM is separated in 2 set of runner and it move on and off with a vaccuum actuator. It could be a bad solenoid, a vac live, a tear in the actuator diaphragm or just rust/dirt in the moving parts...

You car get more load in higher gears and get more time to build boost than in lower gears...