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On a 2003 Lincoln Navigator : The check engine light / service engine soon light is a drawing of an engine located directly under the center of the tachometer
I would check your alternator*(check the spelling).
advance auto or OB II code reader
Auto Zone will check your engine codes for FREE. After finding out what cause your engine light to come on. Then the problem can be resolve with out guessing.
Check your manual.
Typically, you will use 5 quarts of oil. Check your manual for the correct oil capacity. ======================================================== According to the ( 2004 ) Lincoln Navigator Owner Guide : With engine oil filter change : ( 7.0 U.S. quarts / 6.6 liters of 5W-20 )
Check: NADA.com autortrader.com Kbb.com
Auto Zone will check your engine codes for FREE. This way you will know for sure what it is. It maybe a bad Oxygen Sensor.
If your refering to the engine light been on. Auto Zone will check the codes for FREE. If other lights then we need more details...
Check Owner's Manual. If you do not have one. Check Related links below.
Check Owner's Manual. If you do not have one. Check Related links below.
Auto Zone will check your computer codes for FREE. have your codes check and go from there.