Mountaineer 2WD V8-302 5.0L VIN P SFI (2000)
Oil Change Reminder Lamp: Description and Operation
If the connection to the oil temperature sensor is open circuit or shorted, the message center display will read OIL TEMP SIGNAL ERROR instead of
displaying the PERCENTAGE OIL LIFE LEFT during system cheek sequence.
One of these warning messages is displayed when the engine oil life remaining is five percent or less.
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When oil life left is between five percent and zero percent, the "CHANGE OIL SOON" message will be displayed.
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When oil life left reaches zero percent, the "OIL CHANGE REQUIRED" message will be displayed.
The message center indicator will indicate the percent of oil life remaining during System Check. This percentage is based on the driving history and the
time since the last oil change. In order to ensure accurate oil life left indications, the driver should only carry out the OIL CHANGE RESET procedure,
as described in the Owner's Guide, after an oil change.
To calculate the percentage of oil life remaining, the oil life feature uses:
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oil temperature sensor input
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tachometer input from the PCM
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vehicle speed signal input
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clock time (maintained internally by the message center)
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The oil life will decrease from 100 percent to 0 percent in no more than 12,070 km (7,500 mile) or 6 months. It will reach zero percent sooner
under different driving conditions.
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The percentage of oil life remaining is the second display in the system check sequence.
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When oil life remaining is between five percent and zero percent, the "CHANGE OIL SOON" message will be displayed.
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When oil life left reaches zero percent, the "OIL CHANGE REQUIRED" message will be displayed.
