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What do code p1391 mean

I want to know what do code p1391 mean

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  • Cars & Trucks Master
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P1391 means intermittent loss of CKP and CMP , these sensor are monitor when the engine cranking,or running,These can come from a damage flex plate for the cranksensor or damage tone wheel for the camsensor,to a failing cranksensor ,failing camshaft sensor, to even the harness intermittent connnection

Posted on Mar 12, 2012

  • joe palermo
    joe palermo Aug 28, 2014

    how can i fix this problem

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Posted on Jan 02, 2017

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Keep getting code p1391


You may need a shop manual for this one.
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What Is This Error Code P1391 Mean


I have done some research and found my shop manual for a Pacifica doesn't show a code P1391. I found it at another web site it's a crankshaft or cam sensor. What I found is if the car is running somewhat smooth replace the crank sensor if it is shaking when you accelerate there is a good chance your flexplate(flywheel) is cracked or broken.

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99 FordF250 Code p1391 & p1393


Hello
Here are the meanings of these codes.
P1391 FORD - Glow Plug Circuit Low Input Bank #1
P1393 FORD - Glow Plug Circuit Low Input Bank #2
I think you most likely have a burnt out Glow pug controller. Whenever this controller is replaced all glow plugs should be tested for proper function.

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1 Answer

Hii, i have a computer code thingy and i hooded it up to a Chrysler and it gave me the code P1391, i dont know what that is!


P1391 is a code relating to either the Camshaft or Crankshaft sensor. It could also be a wiring connector fault. Hope this helps...

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Car is hesitating have error code p1391 check engine light is on what does this code mean it is not in the book I just put a crank posistion sensor and that fixed it ,now it is doing it again only worse...


p1391 is intermitant loss of signal from crank sensor and cam sensor--change sensors!! change cam sensor first. good luck!! then try it, if still same way. change crank sensor.

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