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i got the the same code the other morning when it was -12 out and tried to start. No a clue but its been 4 days and it hasnt gone away.truck runs normal with it on thou. . . maybe a valve adjustment is in order?
ya I got it all fixed, it was just a sensor $40. And the other code look in the above post!
Alex-03 dodge cummins, 6" lift bilstien shocks, billet Goerend tranny, afe intake system, psc steering stabilizer, 4''-8" stack, glowshift gauges, AD150, smarty tnt-R, S&B air horn, quadzilla BF. and other stuff 425hp. next-turbo,injectors,cp3, head work.
So is the general consensus that changing the batteries fixes the P2509? My trucks been starting really weak and threw P2509 and P1740 (think this one's from the low-stall converter I threw in). Have new batteries solves the weak start and codes? Report back! thanks!!
New batteries fixed mine, too! Make sure you change both. Six months ago, Autozone argued with me and only replaced only one of my failed bats (only 13 months old). Today, the second battery went bad so they ended-up replacing both for free.
I wish they would have listened to me six months ago. Good luck!
I've just got this code P2509 last week. Couldn't figure it out at first, until the starter wouldn't engage. Used a hydrometer on the batteries, each have one cell very low, SG=1.150. I'm using a slow charger and the passenger side is at 1.250 on the bad cell, the drivers side is still at 1.150. I have read that the PCM takes voltage from the drivers side and must see 12 or 12.3. If it doesn't it lights up the CE lamp. I think it still has the OEM batteries.
Today I may swap sides on the batteries, then see if that changes things.
Besides I feel like doing a couple of 60 lbs deadlift
That will give me a chance to clean the terminals as well.
Check engine light came on. Scanned it and it said that I had 1 code.(p2509 powerdowndata lost error)
Anyone have any ideas what this is?
hi, my8, P2509 "ECM/PCM Power Input Signal Intermittent,
it is probable a bad connection to the engine computer. It's got two power feeds, switched/key and constant. The motor won't run without the switched key power on. Long story short, the computer can detect if the power leads aren't solid. That code should give the dealer something to look for. Before bringing it in check the battery terminals, all the fuses, all the relays, and the PCM connector itself (if it's easily accessable).
Helping others is my pleasure!!!
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