2005 Chrysler 300C P0522 Code: Oil Pressure Switch Replacement Still Shows Fault
I replaced the oil pressure switch on my 2005 Chrysler 300C, but the P0522 diagnostic code persists. There was visible oil inside the electrical connector during the replacement, which I suspect may be causing a poor connection. After installing the new switch (purchased from Advance Auto Parts, manufactured by BWD), the engine runs smoothly with no unusual noises or performance issues. However, the oil light now stays on continuously—previously it would blink for about one second. Given that there was oil in the connector, I'm concerned it might be preventing proper electrical contact. I've verified the switch installation and wiring integrity, but I'm still unsure whether the issue lies with a faulty sensor, contaminated connector, or a deeper system problem. Any advice on troubleshooting this P0522 code specifically for the 2005 Chrysler 300C would be greatly appreciated.
As a professional technician, I recommend starting with a true oil pressure test using an actual oil pressure gauge connected to the system. Then, use an OBD2 scanner to check the voltage output from the oil pressure sensor. This will help determine if the sensor is functioning correctly or if there's a signal issue. If needed, clean the electrical connector thoroughly—using an electronic contact cleaner—and ensure no moisture or oil is present. Also, please confirm which engine variant you have (e.g., 3.5L V6), as this can affect wiring and sensor placement. Always verify that the wiring harness isn't open, grounded, or shorted before concluding the issue lies with the switch itself.