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Old 09-05-2009, 11:19 PM   #1
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P2509 code

My check engine light came on this morning and i checked for codes and it had a p 2509. Anyone had this? I know its something to do with power to the computer. How can this be fixed?
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Old 09-08-2009, 03:43 PM   #2
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Check this thread. http://www.thedieselgarage.com/forum...ad.php?t=84703
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Old 09-08-2009, 04:32 PM   #3
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Possible Causes
POOR CONNECTIONS AT THE BATTERIES
LOW BATTERY VOLTAGE
OPEN FUSED B+ TO ECM
OPEN GROUND CIRCUIT
BATTERY + SHORTED TO OTHER CIRCUITS
RETURN CIRCUIT SHORTED
BATTERY + SHORTED TO GROUND
INTERMITTENT CONDITION

I checked my Batteries, while they were a little low they were not the problem.. I've been having a problem with one my EGT Gauge and have concluded that there was enough of a Voltage short and it caused my Code.. It still crackles and I haven't been able to find a new gauge around here to replace it, but After clearing the code it hasn't come back.. I vaguely remember as I had the truck in the Key-On position the Electrical Crackle was louder than normal when I got the code...
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