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P0340 & P1391

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  #1 (permalink)  
Old 10 Jun 2010, 09:51 am
Fresh Cruiser
Join Date: Jun 2010
Posts: 20
Default P0340 & P1391

Hey Everyone!

My fiance's sister has an '01 PT. For about 2 weeks now its been acting up. It will intermittently jerk around pretty hard, and when it does this the RPM's are all over the place, and it shuts off. It will start back up, does it for a little bit more then will clear up.

Took it to Auto Zone this morning, got the codes P0340 and P1391, both pointing to the camshaft position sensor. Now, from what I've read, when the CMP sensor goes bad, the car straight up doesn't run. But her car is running great other than the hiccups it gets every now and then.

I've also deducted from what she has told me about it that it really only does it when the motor is cold. I experienced the problem this morning when I was taking it to the part store, and it did seem to only do it when it was cold, on the way to the store. on the way back it ran perfect the whole way. Don't know if that has anything to do with it, but that's what I've noticed.
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  #2 (permalink)  
Old 10 Jun 2010, 03:18 pm
Obsessed Cruiser
Join Date: Sep 2001
Posts: 27,756
Default Re: P0340 & P1391

The 340 is definitely for the Camshaft sensor and the 1391 says it could be either Camshaft or Crankshaft sensor, plus there's a lot of other reason why you would get those codes.

A good scanner might be able to narrow it down but if you want to try putting parts in yourself, the Camshaft sensor is the easiest.

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  #3 (permalink)  
Old 10 Jun 2010, 08:13 pm
Fanatic Cruiser
Join Date: Dec 2003
Location: San Antonio, Texas
Posts: 535
Default Re: P0340 & P1391

Replace both. They share the same power and ground. One can mess up the other. And the engine will run if the cam sensor goes out. It won't run right but it will run. Also there is a flash for this exact code. you will have to take it too a dealer to have it done though.
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Old 10 Jun 2010, 11:37 pm
Senior Cruiser
Join Date: Jan 2008
Location: I live in Edmonton AB Canada
Posts: 1,643
Default Re: P0340 & P1391

got the same code sensor replaced so far so good
PT Cruiser Inferno Red GT Cruiser. 5Spd 215HO HP 17" Chrome wheels, Chrome gas cap, door spears, door handle cups, door buttons,door lock pins, vent covers,rear spoiler,rear painted mudflaps,, chrome/carbon fibre/like ebrake cover, wiper jet covers,bra, seat covers,Mr. Mikes welting, chrome valve stems and caps, leather ebrake boot,chrome change holder cover,black/red leather steering wheel cover, chrome antenna bezel and chrome 12:" antenna,rear quarter window decals, winter car cover for winter storage, special made DREAM CREWZER dash plaque.upper windshield eyebrow tint , gts headlight protectors, carbon fibre taillight covers,car cover,K&N drop in filter, AMX intake pipe, shiny metal steering wheel spoke covers:Mopar door sills, rear chrome licence insert.street series badge,billett grill,engine start button, red brake calipers,painted engine manifold,chrome vent knobs,chrome/carbon fibre shift knob
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