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Posted on Oct 24, 2009
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How to fix a code p2509 problems on a dodge cummins deisel truck

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Anonymous

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  • Master 986 Answers
  • Posted on Oct 29, 2009
Anonymous
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Please check your ground wire they have a weak link there and have frequent problems on the ground curcit

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Anonymous

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  • Master 407 Answers
  • Posted on Oct 24, 2009
Anonymous
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P2509-POWERDOWN DATA LOST ERROR check battery terminals and make sure batteries are good have them tested

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kc5133

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  • Contributor 25 Answers
  • Posted on Nov 14, 2014
kc5133
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Hi Mine was the batterys. Voltage was low and the ecm wasn't getting it.

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