Code P2609

[EDankievitch]

How old are your battery’s?

 

[Ozymandias]

I had the wife work the truck. Before start up the battery on passenger side checked 12.62. When she switched it on it dropped into the 10.5 range. After start it read 12.06 for a few seconds and boom went to 14+ real quick. Gauge in dash was reading consistent with my meter. Heater apparently never came back on and truck leveled out to a range of 14.32 to 14.37. We put in the B&W hitch and I went down the road to shake it down (SC roads are great for a shakedown). Gauge in the truck was back to rock solid 14 Volts and even the graph was steady. I brought it back and voltmeter was reading just like on startup. Temperature was 45.
The only difference is a shut down over night and no rain and no wipers. No difference with lights on or off. I guess I will have to wait and see if the voltage goes crazy again with the next rain and check the wipers on and off then.
Thanks again for your help.

To me sounds pretty much normal.
Mine does the same and is way older.
You have: resting voltage, then the grid heater kicks in, then after the start the ECM reads 12.06 and decides to switch on the Alternator.
That's fine.

 

[RDick]

To me sounds pretty much normal.
Mine does the same and is way older.
You have: resting voltage, then the grid heater kicks in, then after the start the ECM reads 12.06 and decides to switch on the Alternator.
That's fine.

Got the truck fixed today, It was the Relay. What I did notice is when the P2609 is on I'm not able to use the Remote Start. Works find now. Is this an unusual problem or can I expect this to show up around 20k?
Thanks for all the help. This is why I've been a member since 1998 with three Cummins under my belt.

ron

 

[tgrfan2]

How old are your battery’s?

Sorry it took so long to reply. Batteries seem to be OE. They are still wrapped up and truck was built 10/17. We finally hooked up Sunday and between towing 75 miles and 150 riding around the camping area not a quiver out of the voltage. I guess I will get to see how it does in the rain again this Friday. I see a little bit of rust on a few of the battery nuts so I will clean that up this weekend.
Thanks for your interest and help.

 

[RammerJam]

Sorry it took so long to reply. Batteries seem to be OE. They are still wrapped up and truck was built 10/17. We finally hooked up Sunday and between towing 75 miles and 150 riding around the camping area not a quiver out of the voltage. I guess I will get to see how it does in the rain again this Friday. I see a little bit of rust on a few of the battery nuts so I will clean that up this weekend.
Thanks for your interest and help.

The OEM batteries take a lot of undeserved criticism, IMO.

Here's what happens on a typical New Car lot. Vehicle is made in Jun of that year, gets shipped to the Dealer Lot which could take a couple weeks, depending on train schedule and availability getting stopped and started several times along the way.

Then it sits unless it's a special order. And it sits some more. Then Debbie comes along and wants to see the car behind it, so the Car salesman has to move it. Starts it, runs it for about 30 seconds. Then when Debbie comes back from her test drive, starts it and moves it again. Then Johnny wants to test drive another car behind it. Then it sits some more. For Months sometimes.

Batteries treated like that go bad, I don't care who makes them. You can look on your door sticker to see when it was made, then compare that to when you bought it. Also, what alternator do you have? If you're running Headlights, windshield wipers, defroster, radio etc, it may not be able to keep up if your batteries are weak.

But that's all speculation. Just guessing