Question about 2003 Lincoln LS

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The failsafe mode displyed on my 2006 Lincoln Navigator. What is this and why is it happening? Please respond..

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  • smitchevy64 Dec 10, 2009

    The check engine light is now on.What does the failsafe mode have to do with it.



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What you should know about fail-safe mode
If the engine coolant supply is depleted, this feature allows the vehicle to be driven temporarily before incremental component damage is incurred The “fail-safe” distance depends on ambient temperatures, vehicle load and terrain.
will automatically switch to alternating cylinder operation. Each disabled
cylinder acts as an air pump and cools the engine.
When this occurs the vehicle will still operate. However:
• The engine power will be limited.
• The air conditioning system will be disabled.
Continued operation will increase the engine temperature and the engine
will completely shut down, causing steering and braking effort to
Once the engine temperature cools, the engine can be re-started. Take
your vehicle to an authorized dealer as soon as possible to minimize
engine damage.
When fail-safe mode is activated
You have limited engine power when in the fail-safe mode, so drive the
vehicle with caution. The vehicle will not be able to maintain high-speed
operation and the engine will run rough. Remember that the engine is
capable of completely shutting down automatically to prevent engine
damage, therefore:
1. Pull off the road as soon as safely possible and turn off the engine.
2. Arrange for the vehicle to be taken to an authorized dealer.
3. If this is not possible, wait a short period for the engine to cool.

Posted on Dec 10, 2009

  • Marvin
    Marvin Dec 10, 2009


    whenever the fauil safe is activated the check engine light is turned on by the computer, don't drive this car it is low on coolant or overheating u will damage the engine.


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The engine controller is telling you that one or more engine control sensors or actuators has failed.
The service engine soon light may be illuminated. In either case you should have the vehicle scanned for trouble codes to determine the malfunction.
Auto Zone will scan the vehicle for you at no charge or you can take the SUV to your favorite mechanic to have the codes read. Until the trouble code or codes is verified there is no telling what has failed. I would not wait too long as the vehicle could completely stop or no longer start for you.
Good luck.

Posted on Dec 09, 2009

  • Bruce Bracey
    Bruce Bracey Dec 10, 2009

    The "fail safe" mode has triggered the service engine light. You will need to have the vehicle scanned for the exact cause.



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