4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

P0340 code

Old 11-23-2008, 07:39 PM
  #1  
jheaj
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Post P0340 code

I got the camshaft positioning sensor code to come up a while ago and i went ahead and replaced the camshaft sensor. It came back on the next day so i went ahead and replaced the crankshaft positioning sensor to be on the safe side. It is still shooting out the code after resetting them both times. I am out of ideas and it is hard to crank the engine and i noticed i am using more fuel than before. I have heard that it might be the alternator diodes causing this. Any other ideas?
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Old 11-23-2008, 11:08 PM
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Brute03
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it's more than likely your alternator, specifically the voltage regulator. i had the same prob a while back and it was hell to find
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Old 11-24-2008, 09:40 AM
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BBZracing
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Default Agree...

Had the same issue...after replacing 2 cam sensors I did some research and found info on the alt possibly causing the code. Changed alt and prob solved.

Good luck.
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Old 11-24-2008, 10:36 PM
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jheaj
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Thank you guys for the help. I am going to change the alternator and hope it solves my problem.
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