you need this Map Sensor (4921505)
Map sensor 2001-2002 Dodge/Cummins* *2002 Dodge requires 3104228 adapter
$89.07
and Map Sensor Adapter Harness (3104228)
Map sensor harness required for 2002 Dodge
$13.61
the numbers is the cummins parts order numbers

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deffinatly not worth it,IMO.i've seen comp boxes sell for $250 used.juice with attitude used for about $500,which might be better for you.