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I have a CAT C3000 and i am getting the codes P3, P4, and P7. So there is no communication at the VCM, ECM, or MP. I am getting the LED Blinking on the back of the VCM, and it was the letter B confirming the codes on the dash. Was the fix a combination of a new ECM and harness? Any help would be appreciated.
  • Posted 18 Mar 2016 00:39
  • By sbhbrett
  • joined 18 Mar'16 - 17 messages
  • Texas, United States

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