mazda 2002 mpv code# p0446, p2404 p0424

Question

I took my car for diagnostic and after 3 hours all the could come up with was the given codes. I was told I had water pump leak, so needed "LDP" and "canister assembly" whatever they are? Had a rough idle,slight lose of power but misfiring. has happened before and it was ignition coil . replaced coil and plus and problem disappeared. they seem to be failing one at a time every two years but have replaced all but two now.

Answer 1

P0446 Evaporative emission control system vent control malfunction

P2404 Airfilter clogging

When P0446 and P2404 occur these 2 code together Mazda has a TSB about the required reapair to resolve the issue. TSB # 01-003/07, this will require either the installation of a liquid purge box kit, and (or) reprogram of the PCM