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Codes 471, 717,711,and 712
  • drew_b
  • Massachusetts, United States
471,717,711,[url removed] know what these codes mean and how to too trouble shoot each of them.... my question is does any one know why these codes ALWAYS occur together... I just can’t figure it out, the root cause? Thanks for the help.
  • Posted 23 Feb 2018 11:51 AM
  • • Modified 23 Feb 2018 11:58 AM by poster
Total replies: 2. Showing items 1 - 2 of 2 results.
Replies
Replacing all vacuum hoses and PCV valve will often reduce these nuisance 700 range codes. Experienced a 471 recently and after checking electrical system, found low alternator output and excessive alternator ripple voltage. Changed alternator and fault did not return.
Maybe just a coincidence, time will tell.
Have also noticed the faults become more frequent with engine age/hours.
  • Posted 25 Feb 2018 07:05 AM
  • drew_b
  • Massachusetts, United States
Thanks for the feedback. I’ll be looking at the alternator on Monday.
  • Posted 25 Feb 2018 11:25 AM
Total replies: 2. Showing items 1 - 2 of 2 results.

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