I have the iphone Automatic Link that plugs into the ODB-II port under the dash, to monitor gas mileage, and check engine warning codes (with ability to clear codes). Just learned that it won't work on Diesel engines. Haven't tried as don't have the truck yet. Anyone know of a replacement that works for diesel? Would like to monitor fuel mileage, monitor engine/system events, and track sensors like temp, pressures etc. and have it communicate with the phone. Thoughts?