2004 Mustang GT code P0340 stalls on start up - Ford Mustang Forum
 
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post #1 of 6 (permalink) Old 01-05-2010 Thread Starter
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2004 Mustang GT code P0340 stalls on start up

has 76k,starts or tries and backfire,start again usually ok till next startup. doesnt always do this but only code is p0340. ideas,experiences?? thanks wes

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post #2 of 6 (permalink) Old 01-05-2010
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The code is for the a camshaft position sensor.....That is about all I can help on this one


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post #3 of 6 (permalink) Old 01-12-2010
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I am having the exact same problem with my 02 GT. Same code but I also have an alternator bearing noise that I was told could be setting the cam sensor code because of the frequency. I haven't found out if that is related to the starting problem yet though.
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post #4 of 6 (permalink) Old 01-12-2010
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An alternator with a bad diode or rectifier, I can't remember which one can cause that code. I had it happen to me on my 99, and replaced 3 sensors before a good mod motor mechanic told me to replace the alternator. I kind of looked at him stupid, but did what he said, and the code went away. Unfortunately, I don't think there's a way to test the alternator to see if it's causing the problem.

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post #5 of 6 (permalink) Old 01-13-2010
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Wes, did you get anywhere with this ?
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post #6 of 6 (permalink) Old 01-17-2010
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Okay, just to give you an update. I first tried to put a new IAC on while I was waiting for my new alternator to show up. It did not fix the problem. Put on a new alternator and the problem is now fixed.
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