Conditions For Running DTC

• DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, P0058, P0116, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0139, P0140, P0141, P0150, P0151, P0152, P0153, P0154, P0155, P0156, P0157, P0158, P0159, P0160, P0161, P0221, P0222, P0223, P0442, P0443, P0444, P0445, P0446, P0447, P0448, P0449, P0451, P0452, P0453, P0506, P0507, P1271, P1277, P1278, P1282, P1283, P1511, P1516, P1519, P1523, P1526, P1530, P1551, P2100, P2101, P2107, P2119, P2122, P2123, P2127, P2128, P2138, P2176 are not set.
• The condition exists for 15 seconds or no change is detected for 4 seconds.
• The EVAP purge solenoid is commanded to a 20 percent duty cycle.
• The EVAP vent solenoid is commanded ON.
• The engine is at idle.
• The vehicle speed is 0 MPH.
• The engine load is less than 35 percent.
• The Manifold Absolute Pressure (MAP) is less than 40 kPa.
• The battery voltage is greater than 11 volts.
• The Engine Coolant Temperature (ECT) at engine start-up is between 46-167°F (8-75°C).
• The Intake Air Temperature (IAT) is between 46-167°F (8-75°C).
• The long term FT cells learned (if not learned, engine must run longer than 16 minutes and 45 seconds).

DTC P0455 diagnostic runs once during Phase "D" of the EVAP diagnostic test once per ignition cycle. If DTC P0455 fails, the ECM will re-run the EVAP diagnostic test from the beginning and must fail P0455 again to set.

If an EVAP diagnostic test is aborted due to changing enabled criteria, the ECM will run the entire EVAP test up to 3 times per ignition cycle.