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Old 09-28-2004, 10:12 PM   #1 (permalink)
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P1670 Diagnostic Code----What's it mean???

Just pulled a P1670 Diagnostic code. Table of codes says "EF signal not detected". Does anyone know what that means or where I can look up more
info on it? This is off a 2001 F350 Powerstroke diesel.
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Old 09-28-2004, 10:47 PM   #2 (permalink)
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Old 09-29-2004, 12:32 PM   #3 (permalink)
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Thanks, I'll be anxious to find out.

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Old 09-29-2004, 01:44 PM   #4 (permalink)
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it means there's faulty circuit between the pcm and the idm (injector driver module). you'll have to check the resistance of the wires between the idm and the pcm. wiggle the wires while checking and check for spike in v or open.
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