EVAP System Leak Monitor

This monitor applies to DTCs P0442, P0450, P0451, and P0455. Following conditions must be met during the test:

• Engine coolant temperature must be 75°F (30°C) or less.
• Atmospheric temperature is 41-113°F (5-45°C).
• Selector lever is in "D" range.
• Test may not run if fuel tank is over 2/3 full.

Monitor takes about 8 minutes to complete. To run monitor, use illustration. See Fig 1 . Perform steps as follows:

1. Remove all test equipment from vehicle and install all components and connectors that were removed or disconnected during testing.
2. Start engine.
3. Accelerate to 55-60 MPH.
4. Travel for 3 minutes and 20 seconds or more while keeping speed at 55-60 MPH (5th gear on M/T).
5. While keeping accelerator pedal position constant, keep speed at 55-60 MPH for 150 seconds or more (this is when monitor runs).
6. Return vehicle to shop and turn ignition off.

Fig 1: Running EVAP System Leak Monitor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.