38 --- Engine lubrication system failure
Engine oil defective. Oil pump shaft or locating pin sheared off from ingesting debris or seizing from lack of lubrication (low oil level).
Engine oil level toe low. Inspect for leak or other problem causing low oil level and add recommended lubricant. See Routine Maintenance - Check the engine oil level.
Engine oil viscosity toe low. Very old, thin oil, or an improper weight of oil used in engine. Change to correct lubricant.
Camshaft or journals worn. High wear causing drop in oil pressure. Replace cam and/or head. Abnormal wear could be caused by oil starvation al high rpm from low oil level, improper oil weight or type.
Crankshaft and/or bearings worn. Same problems as paragraph 5 (=above). Overhaul lower end. See Chapter 1 - Engine.
Relief valve stuck open. This causes the oil to be dumped back into the sump. Repair or replace. See Chapter 5 - Fuel & Oil.
© April 2015