Notices
4.6L V8 Technical Discussions Any questions about engine, transmission, or gearing can be asked here!

Alternator dying (bad diode) causing P0340

Thread Tools
 
Search this Thread
 
Old 06-27-2009, 07:16 PM
  #1  
Kotobuki
3rd Gear Member
Thread Starter
 
Kotobuki's Avatar
 
Join Date: Apr 2008
Location: Texas
Posts: 671
Default Alternator dying (bad diode) causing P0340

So, last weekend I was on vacation and on my way home and my CEL came on. When I got back I threw my code reader on, and got P0340 Camshaft Position Sensor Bank A Circuit Malfunction. Did a little reading, and found it's often caused by EMI from a dying alternator. Wonderful. So, I go to my Local parts store, have them throw their diagnostic tool on it, and sure enough bad diode reading.

So, time to swap an alternator at 43,000 miles. Joy. Of course, they don't have it in stock, and it's special order only. And they can't get a price until they special order it, and they can't special order it until Monday. So, I'm thinking of taking it to an alternator shop (or possibly the dealership down the street) and having them re-build it.

Couple questions for those of you that have had this problem. First, could you get a dealership or alternator shop to rebuild it? If so, what was the cost and turnaround time. It's my only car, so it'd have to be something I could wait around on. If there was no one around who could rebuild it, where did you get a replacement from, was it a Motorcraft part, or aftermarket, and what was the cost. And have you had any problems since? Finally I'm in Houston, TX so if anyone here has had this issue, your input would be most highly appreciated.

From my understanding I've got about another week or so to get this taken car of before I'm liable to get stranded somewhere from the alternator failing completely, so I'd like to get it taken care of... but I'm in the middle of paying for a wedding, and this is just totally **** timing for having to shell out more money and would like to do it on the cheap (so much so as is possible with an alternator).

Any help or information you guys may have would be greatly appreciated. It's a little too late to call around to dealers or I'm sure independent alternator shops today, but I'm off Mondays, so I'll be able to work on it then.
Kotobuki is offline  
Old 06-28-2009, 02:51 AM
  #2  
Blazing Saddles
 
Blazing Saddles's Avatar
 
Join Date: Sep 2006
Location:
Posts: 27
Default

http://cgi.ebay.com/ebaymotors/Ford-...Q5fAccessories



.
Blazing Saddles is offline  
Old 06-28-2009, 05:51 AM
  #3  
gburke1
3rd Gear Member
 
gburke1's Avatar
 
Join Date: Apr 2007
Location: Overland Park, Kansas
Posts: 536
Default

Same code happened to me. I ran the car on it for about a month or so with the code and it was fine, never died on me or anything. I found a replacement alternator on eBay for $50... but that was a lucky find. The $130 one is a good deal too.
gburke1 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Golfsito
GT S197 General Discussion
9
10-06-2015 11:02 AM
StalkerGT
5.0L (1979-1995) Mustang
13
09-25-2015 02:41 PM
mrmrultimate
Texas Regional Chapter
2
09-10-2015 09:43 AM
Mobiusone stang
2005-2014 Mustangs
7
09-07-2015 08:46 PM
cbird1177711
2005-2014 Mustangs
0
09-02-2015 04:12 PM



Quick Reply: Alternator dying (bad diode) causing P0340



All times are GMT -5. The time now is 06:13 AM.