P0340 Error Code - Mustang Evolution

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Old 05-20-2015, 07:39 AM   #1
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P0340 Error Code

Is there anyone who is familiar with this code? My tuner is stating that it is a Camshaft Position Sensor Circuit Malfunction, but from other post I've been reading that it may have something to do with the alternator.

I'm gonna check the alternator later today, but I don't think that's the problem.


To give a quick run down, yesterday I replaced my spark plugs and intake manifold with MSD 37164 pulgs and a Ford Racing manifold. I then loaded a Bama 93 race tune. The car was running fine for a couple of hours until it popped a CEL. Even with the light on, the car runs strong, and is not having any problems.

My question is could the tune be causing the light to come on, or could it possibly be the plugs or manifold? Again I've read that could be the alternator, but I'm not sure it is. Any advice would be greatly appreciated.




05 Sonic Blue Gt. Current mods: Bama 93 Octane Tune, JLT Intake, Ford Racing Manifold, Borla Stingers, Pypes O/H, Hotchkis Sway Bars, Koni SRTs, H&R Super Sports, Steeda LCA, BMR Relocation Bracket, Whiteline Bumpsteer Kit, Whiteline Endlinks,Steeda Panhard Bar and Brace
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Old 05-20-2015, 11:16 AM   #2
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I'd start simple at the Cam Position Sensor connector. Make sure it's fully seated and the wires don't look like they got pulled or pinched with your recent work. Attached is the code breakdown. Good luck with the hunt.
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Old 05-20-2015, 11:38 AM   #3
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@f07mustang ill go ahead and check the connector later this afternoon and see if that the problem. Thanks for the reply.

05 Sonic Blue Gt. Current mods: Bama 93 Octane Tune, JLT Intake, Ford Racing Manifold, Borla Stingers, Pypes O/H, Hotchkis Sway Bars, Koni SRTs, H&R Super Sports, Steeda LCA, BMR Relocation Bracket, Whiteline Bumpsteer Kit, Whiteline Endlinks,Steeda Panhard Bar and Brace
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