| Excessive engine oil consumption |
- Verify the engine oil filler cap, the oil drain bolt, and the 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, SPRING, AND VALVE SEAL REMOVAL
).
- 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) procedure (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) procedure (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 (see
OIL PUMP OVERHAUL ).
- Test the oil pump (see
OIL PUMP INSPECTION ).
|
A wire shorted to ground between the powertrain control module (PCM) and the oil pressure switch |