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what causes a 2509 code

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  #1  
Old 04-06-2011, 07:00 PM
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Default what causes a 2509 code
ok what would cause this code i have seen some say bad ground and some say its the batteries but mine are reading 10v with key on is that the problem.

When turning the key to start it just clicks.
 
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Old 04-06-2011, 07:22 PM
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P2509 ECM/PCM Power Input Signal Intermittent

Need at least 12V to the ECM at all times, otherwise it throws that code. How old are the batteries??
 
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Old 04-06-2011, 07:25 PM
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Not sure how old the batteries are.
 
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Old 04-06-2011, 07:32 PM
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Judging on the issue, likely the ones that came with the truck.
 
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Old 04-06-2011, 07:35 PM
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No they are not factory batteries I can't remember right off hand but I think one is a super start and the other is a yellow one
 
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Old 04-06-2011, 07:38 PM
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Need to be the same type and cranking amps need to be also. Type as in wet or dry cells, can't run one of each at the same time.

Best bet is to get two new batteries.
 
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Old 04-06-2011, 07:41 PM
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thats kinda what i was thinking. also does the odometer stay on all the time on these trucks?
 
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Old 04-06-2011, 07:49 PM
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Odometer come on when:

The drivers side door is open, key or no key in ingnition
Key is in ignition, but switched to accessory
Or the switch is in run, engine running or not
 
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  #9  
Old 04-06-2011, 07:54 PM
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When door opens no key in ignition
 
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Old 04-06-2011, 08:14 PM
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Normal. Service guy can get a reading faster/easier.
 
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