Check the coolant and engine oil.. engine is getting heated too easily..that's the issue..
Spray the Throttle Plate with CRC Throttle Body Cleaner
Not better--Test the TPS Sensor and replace, only if it
fails a test
Clean the MAF Sensor with CRC MAF Cleaner
You have an electronic throttle control motor,
if the throttle plate sticks ,it goes into ETC Failsafe and shuts off
or only goes 6MPH
You don't need a dealer ever.
Any shop with a scan tool can clear codes.
You turned Advance Trac off.
What was the part about bypassing something?
You can not do that ???
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THANK YOU {user name} 'fordexpert', your advice helped me to resolve my Navigator shut down issues. I went on several sites for solutions but your feedback was the most helpful.
'fordexpert' explained on this site that with the Lincoln Navigator the traction assist works by throttling down the engine when it detects a difference in rotation from 1 wheel to the next, so if I could bypass the traction control I may be able to drive without the fear of my truck shutting down on the interstate.
After trying this solution I wanted to wait a few months to make sure the issue had been fully resolved before I recommended this solution to others.
What I did not realize is that my tires had been badly punctured so I believe the 'advancetrac' option noticed something wrong and was causing my truck to shut down while I was driving.
Obviously this is very dangerous I was on the interstate at high speeds two of the three times my truck shut down. Keeping the 'advtrac' option off until I could replace the tires and have my electronic system reset at the dealer allowed me to drive safely without my truck shutting down.
After I replaced the tires also the issue appears to be fully resolved. So if anyone is having similar issues like I had with my '03 Navigator shutting down while driving, I recommend:
1) turn adv trac option off {bottom button on the Navi dashboard}
2) have your electronic system reset at the dealer
3) make sure your tires do not have any issues
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