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Home >> Honda >> 2007 >> Element SC, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Advanced Diagnostics >> DTC P0420: Catalyst System Efficiency Below Threshold >> Driving Pattern

Driving Pattern

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Fig 1: Vehicle Driving Pattern
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  1. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on.
  2. Drive the vehicle at a speed between 45 - 75 mph (73 - 120 km/h) for at least 5 minutes, to warm up the TWC.
  3. Set a vehicle speed of 55 mph (88 km/h) on the cruise control, and drive for at least 1 minute.
    • Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.