P0340 code camshaft position sensor

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12-16-2015, 02:16 PM

mjgalvan23

Thread Starter

Join Date: Dec 2015

Location: Tx

Posts: 7

P0340 code camshaft position sensor

I have 175k miles on my 2004 mustang gt automatic with the service engine light on. I have replaced the CMP with a motorcraft brand and no luck in eliminating the problem. the car is running poorly, backfiring, hard to start. any suggestions on what I need to do?

12-16-2015, 07:11 PM

JimC

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Join Date: May 2006

Location: Michigan again!

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This is for issues with the forum i.e. the website.

You need to post in the 2004 section.

12-24-2015, 08:00 AM

99GTvert

is my username.

Join Date: May 2006

Location: Earth

Posts: 13,807

Moved to tech, good luck.

12-24-2015, 11:27 AM

Z28KLR

4th Gear Member

Join Date: Nov 2009

Location: SoCal

Posts: 1,826

Have the alternator checked, specifically for excessive ac current ripple. "Dirty" voltage output from the alternator can cause this dtc and it is fairly common.

12-25-2015, 09:43 AM

WJL

3rd Gear Member

Join Date: Feb 2013

Location: PA

Posts: 556

Hey Z KLR, 65 degrees in Pittsburgh, Pennsylvania now i know what Christmas in So. California is like. Might even get my car out.

Good call on checking the alt. voltage