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EGR Monitor and Readiness Code: Procedure

WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect the HDS to the vehicle's data link connector (DLC).
  2. Start the engine.
  3. Drive at a steady speed with the A/T in D position, 50-62 mph (80-100 km/h) or above for more than 10 seconds.
  4. With the A/T in D position, decelerate from 62 mph (100 km/h) or above by completely releasing the throttle for at least 5 seconds. If the engine is stopped during this procedure, go to  3 and do the procedure again.
  5. Check the OBD status screen for DTC P0401 in the DTC's MENU with the HDS.
    • If it is passed, readiness is complete.
    • If it is not passed, go to  3 and retest.
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