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P1391 Intermittent Loss of CMP

Tiny
MWBUCHER
  • MEMBER
  • 1998 PLYMOUTH BREEZE
Electrical problem 4 cyl Front Wheel Drive Manual 178k miles

How do I fix or repair a code P1391 (Intermittent Loss of CMP or CKP)? Sometimes the car runs fine, then will start chugging and die. This has happened at different times and conditions. I can jump start the car and it will run a little choppy, and other times it starts right up and runs smooth? Is this possibly an electrical problem?
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Wednesday, February 10th, 2010 AT 9:56 AM

10 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,047 POSTS
Hello,

This is a camshaft sensor communication problem which can be solved by replacing the sensor in most cases. Here is a guide to help you see what you are in for when doing the job.

https://www.2carpros.com/articles/camshaft-angle-sensor-replacement

Here are some diagrams to show you ho the repair will be on your car.

Install target magnet in end of camshaft. Tighten mounting screw to 3 Nm (30 in lb) torque.
Install camshaft position sensor. Tighten sensor mounting screws to 9 Nm (80 in lb) torque.

Check out the diagrams (Below)

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Monday, December 4th, 2017 AT 2:02 PM
Tiny
RJ186
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  • 6 POSTS
No one knows what it is!
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Thursday, February 15th, 2018 AT 12:53 PM
Tiny
MRJACKSON635
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  • 1 POST
Fixed my problem by replacing the crankshaft sensor BTW
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Thursday, February 15th, 2018 AT 7:26 PM
Tiny
RJ186
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  • 6 POSTS
Did that twice.
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Thursday, February 15th, 2018 AT 7:30 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,047 POSTS
It must be a connection problem can you inspect the connector to make sure there are no bad wires or corrosion on the terminals?
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Saturday, February 17th, 2018 AT 11:55 AM
Tiny
RJ186
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  • 6 POSTS
A mechanic said he did that. I think its a broken flex plate :(
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Saturday, February 17th, 2018 AT 12:09 PM
Tiny
KEN L
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  • 43,047 POSTS
Can you make a video and upload it here so I can see what it is doing?
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Monday, February 19th, 2018 AT 9:28 AM
Tiny
RJ186
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  • 6 POSTS
https://youtu.be/wjhfflixeqQ
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Monday, February 19th, 2018 AT 9:46 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Thank you makes my job easier. This sounds like you have a timing belt tensioner that has gone bad which can cause the camshaft to be out of time intermittently which will cause the code. Please check the timing belt and tensioner here are diagrams and a guide to help you see whats going on.

https://www.2carpros.com/diagrams/plymouth/breeze/1998.

Check out the diagrams (Below)

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Monday, February 19th, 2018 AT 10:57 AM
Tiny
RJ186
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Thank you so much!
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Monday, February 19th, 2018 AT 11:43 AM

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