Northstar Engines and System Technical Discussion Discussion, stop engine, low oil pressure warning. oil full in Cadillac Engine Discussion; what is going on?stop engine. low oil pressure warning on dash. check oil and its full. only happened twice....
Automobile(s): 2002.5 F55 STS, 2014 Explorer XLT 4WD
MD Eastern Shore
Re: stop engine, low oil pressure warning. oil full
????????? The oil pressure sending unit on the filter adapter "sends" the "low oil pressure" message if the PCM detects constant oil pressure readings less than 5 psi. That sending unit is known to fail on occasion. The ONLY way to accurately verify running oil pressures is with a mechanical gauge plumbed (temporarily) into the sending unit port.
The oil level sensor in the front side of the oil pan sends the "check oil level" message. That also has failed, and the dipstick is your friend in this case.