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  1. J

    Po2b9 def heater not working

    It's been over a week now. There is a recall campaign to replace the def fluid module but they are back ordered was wondering maybe that could be causing the open circuit.
  2. J

    Po2b9 def heater not working

    Checked wiring and relay and fuse for open circuit on def heater. Replaced heater pump assembly and engine light still on any ideas?
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