Engine Lubrication System

Symptom	Diagnostic procedure	Also check for
Excessive engine oil consumption	1. Check for oil leaks. Check for worn valve guide(s) or worn valve seal(s). Refer to: Valve Stem-to-Guide Clearance Inspection or Valve, Spring And Valve Seal - Removal and Installation Check for damaged or worn piston ring(s)Piston, Ring, Pin, And Connecting Rod - Removal and Installation . Check for damaged or worn engine internal parts (cylinder wall, pistons, etc.) Block and Piston Inspection .	Check the maintenance records as engine oil that is worn out burns off at a higher rate
Low oil pressure indicator does not come on with the vehicle in the ON mode	Do the symptom troubleshooting for Low oil pressure indicator does not come on with the vehicle in the ON mode - Go to: Low Oil Pressure Indicator Does Not Come On With The Vehicle In The On Mode .	An open in the wire between the PCM and the rocker arm oil pressure sensor
Low oil pressure indicator stays on	1. Check the engine oil level. Engine Oil Level Check . 2. Do the symptom troubleshooting for Low oil pressure indicator stays on - Refer to: Engine Lubrication - Low Oil Pressure Indicator Stays On .	A wire shorted to ground between the PCM and the rocker arm oil pressure sensor