NO "SERVICE ENGINE SOON LIGHT "
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Joined: Sep 2003
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From: houston
NO "SERVICE ENGINE SOON LIGHT "
Can anyone help me , the "service engine light" is not coming on, not even when the key is in the ignition, I took it to the Emission test and got a P0401 code, what does that mean?
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Joined: Oct 2005
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From: Louisville, Kentucky
This is a hotly discussed subject. For everything that you could possible want to know about this DTC, see this thread. Good Luck! 
https://www.ford-trucks.com/forums/2...ighlight=P0401
https://www.ford-trucks.com/forums/2...ighlight=P0401
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