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850 Drive Cycles - Getting Your 850 Into Readiness Mode

Created on 2011-03-09 by IPD Staff

If you are having trouble getting your 850 through state emissions test and the source of your frustration is ‘readiness’ codes that aren’t set, the following procedure from Volvo will help set the readiness codes.

Start with the vehicle cool, below 122 degrees F.

Turn off the air conditioning.

Select a location where the driving can be done without violating traffic laws and you can stop safely at the side of the road.

  1. Start the engine and accelerate to approximately 1500-2000 rpm.
  2. Drive for 6 minutes at 1500-2000 rpm.
  3. Stop the vehicle and remain at idle in drive for 70 seconds.
  4. Accelerate to at least 45mph and drive for 5 minutes at 1800-2200 rpm.
  5. Stop the vehicle and remain at idle in drive for 60 seconds.
  6. Accelerate to at least 45 mph and drive for 4 minutes at 1800-2200 rpm.
  7. Stop the vehicle and remain at idle in drive for 60 seconds.
  8. Park the vehicle and turn off the engine.

This procedure must be performed twice from a cold start to set the readiness codes.


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