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Old 11-21-2012, 04:59 AM
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code help

This morning i randomly decided to check to see if my truck was throwing any codes. It said it was throwing code P1670 "EF Feedback signal not detected" I was wondering if anyone knows what this means and if i should be worried about it
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Old 11-21-2012, 05:06 AM
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i did a quick search there is no shortage of threads

are u having any issues

one thread even mentioned that code could pop up with a low bat voltage

if u clear it does it come right back ?
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Old 11-21-2012, 05:11 AM
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i searched through the code thread and couldn't find anything. Since its gotten cold out the truck didn't seem to want to start last week and it does seem like it drains the batteries but ive had them tested and they were fine. But no it doesn't come right back. maybe it just pops up when it has a hard start ?
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Old 11-21-2012, 06:46 AM
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Yeah good luck finding the fix to that P1670 code. I have been fighting it for a month now. I even pulled the harness from the PCM and IDM and did the ohm, ground, and power checks between the harness...all checked out good. Tried two different PCM's and IDM's still no luck. My truck has an occational hard start issue...at first it only did it when the engine was warm now it does it when its warm or cold...frustrating to say the least. I even replaced the injector o-rings because someone thought maybe it was an HPOP issue. I think that code is probably one of the most difficult to trouble shoot ? Anyone have any new ideas on this one ?
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