I have a 2012 Dodge Journey R/T Ralleye, 3.6 L with the MIL light on. My code reader tells me it's a P0520 code (I've erased the code many times in the last few weeks, it keeps coming back)."P0520 OBD-II Trouble Code: Engine Oil Pressure Sensor/Switch Circuit Malfunction. P0520 means there is a problem with a circuit in the engine oil pressure sensor, likely due to the oil pressure switch being defective."Any advice on this one? I've read the intake manifold has to be removed to change out the oil pressure switch... any easier ways? I just bought the vehicle from a local dealer on February 7th (just over 3 months ago). Supposedly a "Certified Vehicle".... what a joke. I told the salesman about it, he has just ignored my texts...When I'm driving down the road, I sometimes notice a somewhat lower than normal amount of oil pressure... is this a problem? Is there a connection between this code and lower oil pressure? How urgent is this issue?