Engine Lubrication System Symptom Troubleshooting Index

Symptom

Diagnostic procedure

Also check for

Excessive engine oil consumption

1.	Check for oil leaks.
2.	Check for worn valve guide(s); or worn valve seal(s).
3.	Check for a damaged or worn piston ring(s).
4.	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

An open in the wire between the PCM and the oil pressure switch

Low oil pressure indicator stays on

1.	Check the engine oil level.
2.	Do the symptom troubleshooting for low oil pressure indicator stays on.

A wire shorted to ground between the PCM and the oil pressure switch