GT Performance Mods 2005+ Mustang GT Performance and Technical Information

P0340 ERROR CODE

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Old Apr 23, 2006 | 09:08 AM
  #1  
05GTSILVER's Avatar
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well i looked it up and it says "cmp sensor fault" so what does that mean

anyone and how do i fix it

thanks
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Old Apr 23, 2006 | 10:15 AM
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It is a Cam Position Sensor malfunction. The most likely culprit is the alternator. There was a big thread on that code that disappeared here. But, read these two threads:

http://www.modularfords.com/forums/2005-mu...odes-44608.html

http://www.modularfords.com/forums/2005-mu...-cel-48794.html
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Old Apr 24, 2006 | 09:54 AM
  #3  
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so i need to take it to ford then, and i might need to get a new alternator?
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Old Apr 24, 2006 | 09:59 AM
  #4  
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yes

same code happened to me this weekend for the first time. I cleared the code and if happens again, it goes in
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Old Apr 24, 2006 | 10:00 AM
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<div class='quotetop'>QUOTE(05GTSILVER @ April 24, 2006, 8:57 AM) Quoted post</div><div class='quotemain'>
so i need to take it to ford then, and i might need to get a new alternator?
[/b][/quote]

Do you by any chance have a Meziere eH2O pump installed?
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Old Apr 24, 2006 | 12:59 PM
  #6  
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NO i got frpp coated headers, magnaflor highflow cats and x, flowmasters, steede pullies, steeda cai with bamachips tune, and 4:10's. and some suspension and body stuff, but no pump.
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Old Apr 24, 2006 | 02:07 PM
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OK... I was just wondering if the pump was contributing to these codes. I'm pretty sure the rest of us had the pumps when we threw the P0340 code.
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Old Apr 25, 2006 | 12:47 PM
  #8  
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From: Virginia
<div class='quotetop'>QUOTE(05GTSILVER @ April 24, 2006, 3:02 PM) Quoted post</div><div class='quotemain'>
NO i got frpp coated headers, magnaflor highflow cats and x, flowmasters, steede pullies, steeda cai with bamachips tune, and 4:10's. and some suspension and body stuff, but no pump.
[/b][/quote]

I have the Steeda Pulleys and I got the same code, Ford replaced the alternator per the TSB, after I got the car back from ford I reinstalled the stock pulleys, and I got the error again yesterday. set the car to stock and I still get the CEL P0340. I do not know, it must be a bad cam position sensor..

Let me ask, just before you get the code does the throttle get boggy, hard to accelerate and does the engine get a little rough? just womdering.
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