OVERKILL
$100 Site Donor 2021
It definitely has a sensor, which is how the oil pressure figures in the cluster are derived. This isn't a 1990 Ford where the gauge just sits at the same spot all the time. At the same RPM and same oil temperature different oils yield different pressures, because the device is an actual oil pressure sensor.It doesn’t have a “sensor”.
It has a pressure switch, and the ECU makes a calculation based on oil temperature and RPM…
It uses a pressure switch that only trips on when the pressure falls below something in the 4-7 psi range.
I’ve seen several that we’re making 7-9 psi on a manual gauge at hot (219-221) idle.
Where are you checking oil pressure? The location on the top of the timing cover is for the VCT system, this is separate from the sensor and location used for system pressure.
But the system does make a calculation, it infers viscosity from oil pressure and oil temperature and this is how you end up with the "wrong viscosity" code if you deviate too significantly. It knows that an xW-20, within reason, should produce a certain amount of oil pressure at a certain RPM and temperature. If that pressure figure is out of whack, it assumes you've used the wrong oil and throws a code.
Edit:
Chrysler sells it as an oil pressure sensor (not switch) under part # 68334877
This goes on the filter adapter (it's #3 in this diagram) in engines without the factory oil cooler:
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