OBD cp9180 won't power on but other OBD turns on In my trailblazer

https://www.obd-codes.com/p0326

code are obd 11 and are available online free.

A code P0100 may mean that one or more of the following has happened: The MAF (mass air flow sensor) may be disconnected, or a wiring connection may be bad The MAF sensor may be faulty

Read more at: http://www.obd-codes.com/p0100

Most likely it's the ignition switch

check cigarette lighter fuse under hood

I know you say all fuses check fine, but check fuse #13 in the underhood fuse panel. This is for the cigarette lighter which also powers the OBDII socket.
Since your engine will not go above 3000 RPM, this indicates that the computer is in "limp home" mode and there is a serious condition going on. You need to get the OBDII to function to read the trouble codes for diagnosis.

Take the car to an Honda company for the connection of the scanner.

The OBDII connector receives its power from the AUX PWR 2 fuse (#15) located in the fuse panel under the rear seat. This fuse also controls the accessory power plugs on the dash.

OBD-II codes can be accessed with a scanner that covers 1996 and on vehicles.

i have 2003 trailblazer ltz 153 000 mileage i have code po440 .i changed gas cap and turned off the chech engine light... i made 300 miles and it was good and today morning i drove a mile and light turned on ..... what do i have to fix ...thanks

the car has mis fired with mean an injector has gone bad or it needs spark pluges and wires i bet it needs the plugs but it could also be both replace the plugs and wires then go from there