i have a 06 dodge 2500 24 valve 5.9 cummins. when i start the truck sometimes it will just turn off like you turned the key off , starts right back up and runs fine but throws a 2509 code at me. ecm/pcm power signal intermittent, i read on here that can be caused by bad batteries, so, i put 2 new 1000 cc amps. still does it. checked and cleaned all grounds still does it,. yesterday i was driving turned left at a traffic light and it shut down, first time while driving, truck only has 36000 miles , like new. the temp has been about 20 degrees and it cycled the grid heater 13 times yesterday morning it pulls voltage down to about 10 volts. i took to local dodge dealer and they say its the fan clutch, is this possible ? any help would be greatly appreciated

 

was not the fan clutch ,dealership replaced it and 12 hours later did the same thing so saturday morning i removed ground cables from batteries scraped the post and clamp with terminal cleaner, then placed a 6 guage ground wire i made from the ground lug on grid hater direct to negative clamp on battery and so far so good , i'll post if it did'nt work when it screws up or if it don't i will post in a couple weeks

 

still not fixed @#$#@! im really starting to wish i"d have kept my ford , i did notice a new symtom , when it dont do it ,is when i start the truck and it starts at 1000 rpm , when it does stall it starts at 700 rpm then after 2 or 3 minutes it speeds up to 1000 rpm then runs for a few minutes then shuts down and has 2509 code

 

Well its doesnt sound like a sensor because a sensor shouldnt shut the motor off completly like that. I would guess that its a bad ground somewhere. A bad ground will throw all kinds of crazy codes. It could either be a bad ground battery cable or you could have a bad ground in the ECM. Especially if you have an outboard ECM.

 

a bad ecm is also a possibility...remember just because it doesnt have many miles does not mean that parts cant be defective

 

i agree does'nt sound like sensor ,unless ambiant air cause like i stated most of the time when i start it cold the truck starts and runs at 1000 rpm out the gate, but this morning the outside temp was up to about 30 , has been about 20. when i started it the idle was @700 rpm , ran about 2 minutes at 700 then raised to 1000 rpm on its own, i was in garage not even near the truck , it ran at that rpm for about 3 to t5 minutes then turned off, restarted and check engine light was on code was p2509 but it has done this even if i raise the idle using cruise control i removed and cleaned or replaced all grounds i'll let you know what stealership has to say

 

its supposed to idle higher if its just sitting there idling for a while, its supposed to help the injectors or something, so thats not a symptom of anything. sometimes mine will start in high idle sometimes it doesnt

if you have a pressure box or anything that you recently plugged in, try taking it out and see if that cures it

you should fill out your sig.

 

back at stealership , they are putin in a new pcm/ecm.... hope this does it, out of ideas... maybe a match and a can of gas is in order. , worked good for bringin that 15 pointer i got at 5:00 this morning . 205 lbs. of field dressed dear MMMMMMMMM thanks again for all your help

 

The idle thing is sposed to do that. It warms up the engine and is alot easier on them than idlein at 750. Thats why semis have an idle set deal, so when they are parked they can "idle them up". Congrats on the buck!

 

Positive cable that comes from secondary batt to primary batt clean connection at primary batt where both cables bolt together use grease.