I had dead batteries on my truck and got them fully charged with a charger. Well today, I went out and started it and the parking brake light and the ABS light would not go out. I put the Smarty on it to check for codes and got a P2509 which is POWERDOWN DATA LOST ERROR. Do any of you know exactly what this is? I cleared the code and restarted the truck and the lights didn't stay on this time. I didn't drive the truck, but she was purring like a kitten. -

MRaynor's Sig:

Mike

05 2500 CTD 4x4 LB Quad, Autometer ultralite pyro and 60# boost gauges on A pillar, Quadzilla Monster Intake, TCS TQ, Suncoast VB, MAGTECH pan, Howards cool down timer, SS nerf bars, fire & ice light bar on the rear, Recon amber LEDs under the cab, 5" miter cut stacks with no muff and 285/70/17 BFG AT/KOs.

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IIRC it just means that the computer ran out of power. Did you have to reset anything on the radio also? -

06 DIESEL's Sig:

My rig - 06 Dodge Ram 2500 Crew Long 4x4 SLT CTD 6 speed

A little here, a little there, now it smokes

Service manual was in Greek!! Just like 06DIESEL said, in a simple way!! Was insufficient voltage to retain the memory in the ECM. -

wildbill's Sig:

I Drive An 06 Dodge Ram 2500

Powered By a 5.9 Cummins

It Has Some Parts But Could Use More

95,000 Miles

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Yep, I lost all presets and time. That would make sense though, it took almost 48 hours to charge both batteries. -

Saved an alternator also. -

I didn't even think about that, but you are correct. -