I've searched but I've only found 2 references to it, neither of which seemed helpful.

 

I can't find any useful reference to it nor can I find any Mitsubishi P3xxx codes at all and the generic P3xxx codes don't go up to P35xx

This lists all of the X codes: http://www.roadraceengineering.com/e...l-dtccodes.htm
OBD Codes (Includes Generics): http://www.obd-codes.com/trouble_codes/

Sorry dude, maybe try calling the stealership they might be willing to tell you the code.

 

What are you using to read the code?

 

I'm using a EvoScan 2.9...(whatever the newest version is).

 

Evoscan 2.9 does not read codes properly.
You have to use Evoscan 2.8.
You should be able to find it if you Google it.

 

Evoscan 2.9 will show codes with junk hex values, use 2.8 like Bill said.