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Car died on Highway - code 1391

 
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  • 1 Post By ptcruisersteve
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Old 12 Jan 2019, 02:15 pm
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Default Car died on Highway - code 1391

Hi guys,

the wife's 2001 pt cruiser limited died on the highway is slow moving traffic on Thursday. I scanned the car and got P1391 fault code. no other codes. I have done some research on here and elsewhere on the internet and found that it could be either or both the crankshaft sensor and camshaft sensor, wiring or jumped timing.

The car doesnt start but it does turn over. the belt is still intact but i believe it is the original one. Car has 99k miles.

I replaced the camshaft sensor on the side of the highway with an aftermarket one. I'm aware the it is recommended to get a MOPAR one but that wasn't accessible to me at the time the car broke down on the side of the road.

I am here to seek help on identifying he culprit of this.
How do I determine which, if any or both sensor is faulty?
How can I tell if it has jumped timing?

Thanks,
Dean
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Old 12 Jan 2019, 02:30 pm
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Default Re: Car died on Highway - code 1391

Make sure the clip holding up the crankshaft wire harness did not break allowing the wire harness to run on the half shaft shorting out wires. This has been happening to other members on the 2001 PT Cruisers.
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Last edited by ptcruisersteve; 12 Jan 2019 at 02:35 pm.
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Old 12 Jan 2019, 03:01 pm
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Default Re: Car died on Highway - code 1391

Quote:
Originally Posted by ptcruisersteve View Post
Make sure the clip holding up the crankshaft wire harness did not break allowing the wire harness to run on the half shaft shorting out wires. This has been happening to other members on the 2001 PT Cruisers.
Thanks. I have had a look underneath and I believe this may be the problem. It looks like part of the wiring has indeed fallen and rubbed through on the axel boot. I can see the strands of the wiring.

Is there a part number or tutorial on how to replace/fix this?
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Old 12 Jan 2019, 05:03 pm
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Default Re: Car died on Highway - code 1391

Disconnect the negative battery cable. Clean the harness. Unwrap the harness as needed. Repair the wires by soldering if broken, and coat with 'liquid tape'. Then tape as needed. Hang the harness to prevent it from happening again.
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Old 13 Jan 2019, 10:53 am
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Default Re: Car died on Highway - code 1391

My harness also rubbed like that was giving me intermittent fits..

Had to cut and splice...(solder and heat shrink)
Limited space too work..
But hey that's everything on a PT
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Old 13 Jan 2019, 04:41 pm
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Default Re: Car died on Highway - code 1391

thanks for the replies and the info. I managed to get the wire sliced back together but still not start. I have cleared the code. The wire that had rubbed through was the black wire with the white stripe, i believe the ground.All the small gauge wires where intact.

I took the upper timing belt cover off to see if I could check the timing. The belt is in bad shape with some of the edges torn off. When turning the crankshaft pulley by hand I can get the two timing mars on the camshaft to line up bu I cannot see if the crankshaft is also lined up.

With the belt being the way it is i know that it needs replaced. Im not sure if I want to sink anymore cash into the car and I would like to know for sure that this is the problem before even thinking about doing the job.

Is there any way to tell if everything is timed correctly without taking the crankshaft pulley off and basically starting the job?
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Old 13 Jan 2019, 04:50 pm
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Default Re: Car died on Highway - code 1391

Had same thing happen a few years back.. same exact code. The code comes back to a bad sensor.. I replaced it and nothing. My timing belt went. Thats what it is. Strange thing is you said you can see the belt and its in bad shape. Have you been able to make a full rotation of the belt from one point to another and see if it is in fact still in one piece? I think that even if it gets frayed really bad and is stretched or loose, itll skip or something else and then throw the same code.
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Old 13 Jan 2019, 04:55 pm
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Default Re: Car died on Highway - code 1391

I have turned it over a few times. the belt is intact, meaning it is a complete circle. There are several sections where its frayed and a couple of mil missing from the edge closest to the engine mount.
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Old 13 Jan 2019, 05:21 pm
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Default Re: Car died on Highway - code 1391

no sure if this helps identify anything but i did a compression test on cylinders 1 & 4 (not the middle two). Got 80 on cycler 1 and 50 on cylinder two.
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Old 13 Jan 2019, 05:50 pm
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Default Re: Car died on Highway - code 1391

Quote:
Originally Posted by dis00 View Post
no sure if this helps identify anything but i did a compression test on cylinders 1 & 4 (not the middle two). Got 80 on cycler 1 and 50 on cylinder two.
All the spark plugs needs to be removed before you can get an accurate reading on the engine compression. Make sure the throttle is wide open and your battery is fully charged.

It also wouldn't help to do a wet test on cylinders 1 & 4 to make sure your piston compression rings are okay and does not make much difference on the engine compression test.
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