2000 Bentley low oil pressure at idle - 2002 Bentley Arnage

the oil pressure hot on your test gauge will be below recommended pressure necessary for the proper lubrication of the engine . The control module as you say will be set higher to notify you before that pressure is reached so that there is sufficient time to shut down the engine

Sounds more like an engine idle issue than a oil pressure issue. If the engine idle drops too low, the oil pump cannot provide sufficient oil pressure. If there is no oil light when the engine is idling normally, then there is no problem there.

Check level 1st it might just be bad oil pres. Switch use correct oil u may need to have oil pressure checked with gauge if bad need oil pump

Oil pressure always changes with rpm.
At idle you should have around 10 psi, and it should max out at high rpm around 50 psi or so.
You not only can't have as much pressure at idle, but you don't need it either.

Low oil, bad sensor, really low idle.
First check oil level.
then if oil level is ok, and oil light is still there, pay attention to idle has to be 750 to 850 RPM.

If idle ok, give gas to increase idle to more than 2000 rpm if light goes away you need a sensor called OIL PRESSURE SWITCH.

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sounds like you have sludge build up in the engine. you should try a oil additive to help clean out some of that sludge on your next oil change

make sure are using a genuine dodge oil filter and correct grade of oil to check further you need to have the oil pressure checked using a master gauge a garage would do this for you if ok replace pressure switch if very low could be pump and bearing wear is the idle speed set too low i would check this

Please ignore this light. Or you can take your car for a scan so it could be fitted well to give accurate indications.

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At idle the oil pressure should be at least 20# at highway speed it should be at least 30# these pressures are on the low end higher is better.