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P2509 and P2149 codes tonight in my 2007 5.9 CTD Mega Cab

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#6 injector removal tips

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Hi. I just bought a newer truck a week ago and was running great. Then when I started tonight at work it ran rough and almost died. It straightened out by threw out these two codes, P2509 and P2149.

When it was running bad, my dash voltmeter was way down like eight volts. I checked out the batteries and they are 2006 MOPAR models that came with the truck from the factory! Amazing! Then is when I threw the codes and MIF light.
I checked out the connections on the batteries and three out of four I removed without a wrench. When I remove the first one the light under the hood went out which means only one battery was doing it all. I brushed them and used conductive battery grease on each connection. I'm charging them tonight.

Sorry for the length. Could bad batteries or connections cause these codes?

Where to look next if this didn't help? Thanks, Herb
 
The P2509 for sure. It means the B+ to the ECM was lost with the key in the run position. If it isn't the battery cables, check the B+ lug that goes from the battery to the TIPM. The injector code may or may not be related. Clean up your connections, clear the codes and see what if anything returns. If the are the original batteries you are on borrowed time.
 
Sounds like one of your batteries has shorted internally. I would get them load tested (separately) and not operate the truck this way until you know for sure they aren't shorted. Otherwise you could be in for much more trouble.
 
Good connections are critical. I wound up replacing my batteries a bit early because of a bad connection, mostly just on one battery. If they are the original batteries, you are definitely due for new ones. 6 years is about all you can generally expect of them. Yes, I know some have gone longer but I said generally. No flames please.
 
Good connections are critical. I wound up replacing my batteries a bit early because of a bad connection, mostly just on one battery. If they are the original batteries, you are definitely due for new ones. 6 years is about all you can generally expect of them. Yes, I know some have gone longer but I said generally. No flames please.

No flames from me. I don't see why anyone would push them to the point they leave you sitting someplace.
I'd rather replace them in the comfort of my garage rather than the side of the road someplace.
 
I replace the battery in the wife's car every three years if it needs it or not. It will only break if I'm out of town and she is in a hurry! Can't think of a better return on $75.
 
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