Fault Codes 3720/15 & 3720/16

Both codes indicate that the DPF has reached the end of its service life and must be replaced.  Replace DPF and perform Ash Accumulator reset using DDDL.

Aftertreatment maintenance intervals:

  • EPA 07: Remove ash at 300,000miles(480,00km) or 9,000 hours
  • EPA10/GHG14: Remove ash at 300,000-400,000miles(480,000-640,000km) or 9,000-10,250 hours
  • EPA10/GHG14: DEF pump filters are to be replaced every 150,000miles(240,000km)
  • EPA10: DEF pump air bladder, needs to be refilled every 24 months

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