I b ought this code reader and used on my Dodge Caravan 2002. It reads P0108 Manifold absolute pressure/Barometric pressure circuit high. what does it mean?? Further going to I/M, all the following remain at INC. Can anyone explain what is wrong with the vehicle. Check engine light is still on. Catalyst monitor Evaporative sys. monitor, Oxygen sensor monitor, Oxygen sensor heater monitor Thanks.