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have this 04 Durango 5.7 Hemi it had the following dtc’s p0300 p0315 p0330 p0335,so I replaced the crank & knock sensors,no change,so I went under the vehicle and removed the plugs from the knock & crank sensors,then removed the plug from the starter,(it’s easier with starter out) then I cut open the protective plastic to access the wires & to my surprise there were two wires that were broken,so I solder both back put everything back reconnect the battery & she fired right up no engine light,runs like a dream,so to begin I bought this vehicle with a cracked block,after a full rebuild it would take like 30seconds if cranking before it would start,when going 60 mph the rpm’s were at almost 3k,engine light was flashing,and ran like crap,so if anyone has experienced these symptoms and codes,it might be wise to check wires first.thanks guys.i just joined to share this info.