My 2002 Montero Sport XLS 3.5L has a check engine light on.
The code is 441 incorrect purge flow.
I am not sure if these are related or not but..
The last few weeks the idle has been extremely low and has actually died at stop lights a couple of times.
Also the heater doesnt always blow hot air. It takes a long time to warm up and will randomly turn to cold air. (yes the coolant is full)

Any ideas on the engine code?

 

This is not much help, the there was a Service Bulletin related to that code:

2002 Mitsubishi MONTERO 02 - Other > OTHER [Part 980000 ]
TSB No: TSB0213011 Replacement: TSB0213011 NHTSA ID: 635113 , June 01, 2002
Summary: subject regarding diagnostic trouble code p0441 evaporative emission control incorrect purge flow diagnosis - service manual revision. *tt

That's all I could find, but I think you can get (buy) TSB's at www.alldata.com Or find a friendly dealer who might share the info.

Ron