Volvo 850 Service Light Reset

Resseting service light reminding needed oil change.

INFO: Applicable to pre 1996 models without DLC or OBD port.

  • Turn the key to ignition
  • Remove diagnostic port A plastic cover
  • insert jumper to socket # 7

Do as follows:

  • press button 4 times
  • wait 5 seconds
  • LED will light up steadily
  • press button 1 time
  • wait 5 seconds
  • LED will light up steadily
  • press button 5 times
  • wait 5 seconds
  • LED will light up steadily
  • press button 1 time
  • LED will flash, resetting done
  • turn the key to off position.

Service light triggers (just one of the following must occur):

  • travelled distance of 16 000 km
  • engine working for 750 hours
  • 1 year passed

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