Engine Lubrication System Symptom Troubleshooting Index

Symptom	Diagnostic procedure	Also check for
Excessive engine oil consumption	Check for oil leaks. Check for worn valve guide (s); or worn valve seal (s) . Check for a damaged or worn piston ring (s) . Check for damaged or worn engine internal parts (cylinder wall, pistons, etc.) .	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 .	An open in the wire between the PCM and the oil pressure switch
Low oil pressure indicator stays on	Check the engine oil level . Do the symptom troubleshooting for low oil pressure indicator stays on .	A wire shorted to ground between the PCM and the oil pressure switch