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There are two more common problems to induce a check engine light without any other indications of problems.
1. most common - miss fire due to bad or faulty coil
if this should happen, it an easy fix but tight to get...test coil by switching it with another one if the new reading is the new location then its the coil and replace it. if not then you need more help then i call offer here.
2. O2 sensor - 1 of 4....2 are the front of cat and 2 behind cat most likely on of 2 behind cat, your guess as good as mine...if it is cat back O2 sensor just buy one and replace one but don't through out incase that's the good one, rotate between the 2 old ones to fix the problem.
3. bad fuel--fill up and add gas treatment
4. fuel cap not on completely
5. water in fuel line--add gas treatment and then after 3 driving cycles with no problems, the light will turn off.
What else can I help you with?
What is making a Lincoln ls 2000 v8 backfire?
what is making my Lincoln ls v8 backfire under the engine
Diagrams of Lincoln LS engine?
were are oil stick located on lincoln Ls 3.9 v8
How much horsepower does a 5.7L V8 2001 Lincoln ls have?
The 2001 Lincoln LS , with the 3.9 liter V8 engine , is rated at 252 horsepower
Where is bank 1 on 2001 Lincoln LS V8?
Bank 1 is the passenger side of the engine in your Lincoln LS
Why Check engine light is on Lincoln Ls V8 2005?
Good possibility one of your spark plugs or coils are bad.
Does a Lincoln ls have a timing belt or chain?
On a Lincoln LS : Both the 3.0 litre V6 engine and the 3.9 litre V8 engine have timing CHAINS
How much horsepower does a v8 Lincoln ls have?
According to my 2002 Consumer Guide book : The 3.9 litre V8 engine in a 2002 Lincoln LS is rated at : ( 252 horsepower )
Which cylinder is cylinder 2 on a Lincoln LS v8?
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Lincoln LS ( V8 engine )
How many quarts of oil does your Lincoln ls v8 05 require?
According to the 2005 Lincoln LS Owner Guide : With engine oil filter change : The 3.9 liter V8 engine takes ( 6.5 quarts of engine oil )
Where is cylinder 8 located in a 2001 v8 Lincoln ls?
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Lincoln LS ( V8 engine )
Where is cylinder 4 located in a 2001 Lincoln LS V8?
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Lincoln LS ( V8 engine )
Where is the location of Mass Airflow Sensor in a 2005 Lincoln LS V8?
On a 2005 Lincoln LS , 3.9 liter V8 engine : The Mass Air Flow sensor is in the top section of the engine air filter housing
