| Excessive engine oil consumption |
- Verify that the engine oil filler cap, oil drain bolt, and oil filter are tight.
- Check for oil leaks.
- Check for worn valve guide(s) (see
VALVE INSPECTION
) or worn valve stem seal(s). (see
VALVE INSPECTION
).
- Check for damaged or worn piston ring(s) (see
PISTON RING REPLACEMENT
).
- Check for damaged or worn engine internal parts (cylinder wall, pistons, etc.) (see
BLOCK AND PISTON INSPECTION
).
|
The correct grade of engine oil |
| Low oil pressure indicator does not come on with the ignition switch in ON (II) |
- Do the low oil pressure indicator circuit troubleshooting (Open) (see LOW OIL PRESSURE INDICATOR CIRCUIT TROUBLESHOOTING (OPEN)
).
- Test the oil pressure switch (see OIL PRESSURE SWITCH TEST
).
|
An open in the wire between the powertrain control module (PCM) and the oil pressure switch |
| Low oil pressure indicator stays on |
- Check the engine oil level.
- Do the low oil pressure indicator circuit troubleshooting (Short) (see LOW OIL PRESSURE INDICATOR CIRCUIT TROUBLESHOOTING (SHORT)
).
- Test the oil pressure switch (see OIL PRESSURE SWITCH TEST
).
- Check the engine oil pressure (see OIL PRESSURE TEST
).
- Check the oil filter for clogging.
- Check the oil screen for clogging.
- Check the relief valve.
- Inspect the oil pump (see OIL PUMP OVERHAUL
).
|
A wire shorted to ground between the powertrain control module (PCM) and the oil pressure switch |