I’ve just recently rebuilt my 2TRFE engine & got rid of 99.9 % of the gremlins that were causing it headaches…but it still has 1 gremlin I need to eliminate in the ultimate BOSS fight. So driving the vehicle (TRH223Hiace) it’s fine & is currently being ran in. So every now & then when idling it has the little red oil can light flash then disappears. Also does it when in a nose down park (my driveway is steep) I dropped the oil @ 100km & refilled with Castrol 5W/30 full synthetic oil & changed the filter thinking it’s run in oil may be to thick (Penrite 15/40 mineral oil) but it did it again. The oil pressure switch & oil pump is new… I’m hoping someone out there may have some info on killing this gremlin
Grab an old-fashioned mechanical oil pressure gauge and a T fitting and hook it up so you know you have good pressure before something bad happens to your new rebuild.