EVAP Monitor (Key-Off Monitor)

2012 Toyota Prius ThreeSECTION EVAP Monitor (Key-Off Monitor)
  1. Connect the Techstream to the DLC3.
  2. Confirm the following conditions are satisfied:
    • The fuel level is less than 90%.
    • The altitude is less than 2400 m (8000 ft.).
    • The vehicle is stopped (the vehicle speed is less than 2 mph).
    • The ECT is 4.4 to 35°C (40 to 95°F).
    • The IAT is 4.4 to 35°C (40 to 95°F).
    • Driven vehicle in the city area or on a freeway for 10 minutes or more.
  3. Perform the drive pattern:
    1. Allow the engine to idle for 5 minutes or more.
    2. Turn the power switch off and wait 6 hours.
  4. Check the monitor status with the Techstream.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.