EVAP System Leak Monitor

This monitor applies to DTCs P0441, P0442, P0451, P0452, P0453, P0455 and P0456. Following conditions must be met during the test:

• Engine coolant temperature must be 113°F (45°C) or less.
• Atmospheric temperature is 41-113°F (5-45°C).
• Selector lever is in "D" range.

Monitor takes about 8 minutes to complete. This cycle must be completed 2 times. Run monitor as shown. 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 and accelerate to 55-60 MPH.
3. Travel for 200 seconds or more while keeping speed at 55-60 MPH (5th gear on M/T).
4. While keeping accelerator pedal position constant, keep speed at 55-60 MPH for 150 seconds or more (this is when monitor runs).
5. Return vehicle to shop and Turn the ignition switch to LOCK position. Recheck for DTCs. If DTC P0441, P0442, P0451, P0452, P0453, P0455 or P0456 resets, return to appropriate repair procedure under DIAGNOSTIC TESTS .

Fig 1: Running EVAP System Leak Monitor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.