If the previously replaced oil pressure sensor was an aftermarket, as said above, it could very likely be bad, especially if it's made in China. Get one from Chrysler just to make sure it's a "slightly" better quality.....you hope. I bought one for my Hemi LX from the stealer after getting the same light. Only got it once or twice and never did change the sensor. Have the new one still sitting on the shelf, just in case. Apparently there is more than one listed too, as they wanted to know the VIN number so they could make sure I got the right one. I can also monitor oil pressure with my DashHawk and have one screen set up for oil pressure, module voltage (charging system), coolant temp. and trans. oil temp. Oil pressure normally runs from ~23-57 PSI (when warm) on both my Hemi's. Cruising at ~65 mph it's normally between 45-50 PSI.
06 GCO, Dk Khaki, QDII, Flshing Hi 3rd Bk Lt, MDS "ON" Lt, Airtab Vortex Gens, Debadged, Fumoto Drain Valve, BT Catch Can, Chopped EGR Tube, SRT8 CAI, K&N Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tune App, DS Tuner, Cust tubular hdrs w/3 in Magnaflow/Xlerator AP Exh Sys, Bilsteins, SRT Springs/Sways, Cust Eng Cvr, SRT8 frt/rear bumpers, FRI Sidewinder Cam/6.1 valvetrain, SLP 25% UD Pulley, BBK true 90mm T-Body, SOS Ign Coils w/.060 spark plug gaps, SRT Reps with 265/45&295/40X20's.