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 warning message displays on	Check the engine oil level . Do the symptom troubleshooting for Low oil pressure warning message displays on .	A wire shorted to ground between the PCM and the rocker arm oil pressure sensor