Posted 3/6/2014 22:01 (#3738369 - in reply to #3735628) Subject: RE: 01 Dodge Cummins throwing PO121 code
se montana
Check fuel pressure first, at pre filter then next the pump. Then determine a fix... Just did apps on ours, then fuel pump, then injection pump and injectors... Had to keep going to fix
01 Dodge Cummins throwing PO121 code
