Like I said, mine wasn't very dirty. I simply sprayed a bit of throttle body cleaner on there and used a chopstick to scrape the accessible part. Then I took a plastic tie wrap and shoved it up the passage to the EGR after spraying in a bit of cleaner.
The bigger job was cleaning the throttle plate, but that just took a bit of patience and rag and the chopstick and some throttle body cleaner.
If you are getting the low flow code, then you must be almost totally blocked. Have you taken off the throttle plate and looked? (Unless of course, the EGR isn't opening properly.)
If you have the EGR *and* the throttle plate off, then you could blow air through the passage.
The carbon won't blow into the intake with the plate off.
