Regal V6-3.8L VIN K (1997)
Oil Level Sensor For ECM: Description and Operation
DESCRIPTION
The Engine Oil Level (EOL) switch is a simple float switch that is grounded when the engine oil level is OK. When the ignition is first turned ON,
the PCM commands the Low Oil Level lamp ON for a brief period of time to test the bulb (approximately 3 seconds).
The PCM also checks the Engine Oil Level switch circuit at startup. If the engine has been running, the PCM performs a test routine based on
engine coolant temperature to ensure that the engine oil has drained back into the sump before checking the state of the engine oil level switch. If
the engine coolant temperature is between 15°C (59°F) and 140°C (284°F), the PCM compares the engine coolant temperature at the last key OFF
to the engine coolant temperature at the current key ON. If the difference between the recorded temperature values is at least 12°C (54°F), the
PCM will test the engine oil level.