GT S197 General Discussion This section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.

Trouble code or DTC p0340

Thread Tools
 
Search this Thread
 
Old Sep 22, 2009 | 05:27 AM
  #1  
Daniel60's Avatar
Daniel60
Thread Starter
5th Gear Member
 
Joined: Dec 2004
Posts: 4,717
From: Small walk way by big walk way
Default Trouble code or DTC p0340

My wife got this last night when she drove the car home. Anybody ever have this? I read up on it and it said something about the cam timing. Help please. I have reset it the light.
Old Sep 22, 2009 | 04:04 PM
  #2  
Daniel60's Avatar
Daniel60
Thread Starter
5th Gear Member
 
Joined: Dec 2004
Posts: 4,717
From: Small walk way by big walk way
Default

found out this may be a bad coil pack or an illing alternator. Saturday she goes to the shop. Ford said since I don't have a blinking engine light that it doesn't have to be done right away. Either way I guess this is normal since the car turned 5 years old yesterday.
Old Sep 22, 2009 | 05:29 PM
  #3  
mac10chap's Avatar
mac10chap
4th Gear Member
 
Joined: Feb 2005
Posts: 1,660
From: houston, tx
Default

could be cam shaft position sensor. you have 2 on the GT. i had this code and it ended up being too much fuel being added due to a bad tune.
Old Sep 23, 2009 | 12:45 AM
  #4  
Jersey Stang's Avatar
Jersey Stang
2nd Gear Member
 
Joined: Jan 2008
Posts: 401
From: NJ
Default

its a bad alternator. It's very common in the 05's, 06's and some of 07's. I've been through it and many others on this board have also been through it.
Old Sep 23, 2009 | 05:36 PM
  #5  
Daniel60's Avatar
Daniel60
Thread Starter
5th Gear Member
 
Joined: Dec 2004
Posts: 4,717
From: Small walk way by big walk way
Default

thanks everyone. Now please tell me they will not screw me because I have steeda underdrive pullys?
Old Sep 24, 2009 | 01:12 AM
  #6  
Jersey Stang's Avatar
Jersey Stang
2nd Gear Member
 
Joined: Jan 2008
Posts: 401
From: NJ
Default

Originally Posted by Daniel60
thanks everyone. Now please tell me they will not screw me because I have steeda underdrive pullys?
They might bring it up, but it should be out of warranty anyways. there's a TSB on it so ford is aware of the faulty alternator. its just a quick replacement
Old Sep 25, 2009 | 03:38 PM
  #7  
Daniel60's Avatar
Daniel60
Thread Starter
5th Gear Member
 
Joined: Dec 2004
Posts: 4,717
From: Small walk way by big walk way
Default

Originally Posted by Jersey Stang
They might bring it up, but it should be out of warranty anyways. there's a TSB on it so ford is aware of the faulty alternator. its just a quick replacement
I have the extended warranty.
Old Sep 26, 2009 | 09:15 AM
  #8  
Daniel60's Avatar
Daniel60
Thread Starter
5th Gear Member
 
Joined: Dec 2004
Posts: 4,717
From: Small walk way by big walk way
Default

o.k. I went to the shop today to find out that it is a ecm with memory problems. A course I had to pay the 100 dollars to find this out with the extended warranty however my Service Clerk said assure me that nothing is wrong with the car. He said because of the chip I have in the car that it's causing an interference with the memory that is supposed to be in the car being that I have alternated the parameters. I have had the chip in for at least 4 years and honestly I think he could be on to something here. Since the car is running strong as ever and it isn't reading the speedometer or rpms wrong and there isn't no battery light on I'm just not going to worry about it. He echo the same idea. I have reset the light before and it came back interesting though I drove her home over 15 miles away and no check engine light yet. She did put smile on my face because I haven't been driving her much as of late. Hope this might be of an assistance to someone with the same problem.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BOB ROME
5.0L (1979-1995) Mustang
3
Jul 26, 2023 01:54 PM
mrtrodonet
V6 (1994-2004) Mustangs
3
Sep 19, 2020 03:12 PM
CS2007
General Tech
8
Jun 25, 2019 09:45 PM
Dathan
V6 (1994-2004) Mustangs
4
Oct 5, 2015 05:52 AM
ChampInSD
5.0L GT S550 Tech
13
Oct 2, 2015 04:55 AM




All times are GMT -5. The time now is 11:23 AM.