DeVille d Elegance V8-4.6L VIN Y (1998)
Powertrain Control Module: Description and Operation
Change Engine Oil Message
DESCRIPTION
The CHANGE ENGINE OIL message is triggered by the Oil Life Left index.
When the Oil Life Left index drops to 0%, the Change Engine Oil message will appear to the driver.
OPERATION
The Oil Life Left index is calculated by the PCM and stored in the EEPROM (see EEPROM ) of the PCM. The PCM uses coolant temperature, engine
speed, and vehicle speed to calculate the index. After an oil change, the index may be reset by displaying the Oil Life Left index and then pressing and
holding the Reset button on the PC for approximately 5 seconds or by using the scan tool. When the value is reset, 100% Oil Life Left will be displayed.
