Conditions for Running the DTC

P0451

• DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P012B, P012C, P012D, P0222, P0223, P0449, P0452, P0453, P0461, P0462, P0463, P0498, P0499, P0502, P0503, P06E4, P0722, P0723, P1221, P1459, P145A, P2066, P2067, P2068, P2400, P2401, P2402, P2418, P2419, P2420, U0140, U182D, U0073, U0074, P2537 or P2610 is not set.
• DTC P1458 or P145D are not present when the test failed this ignition cycle.
• The barometric pressure (BARO) is between 70 - 110 kPa (10 - 16 PSI).
• The fuel level is between 10 - 90%.
• The engine coolant temperature (ECT) is less than 40°C (104°F).
• The intake air temperature (IAT) is between 4° - 45°C (39° - 113°F).
• The propulsion system is not active.
• The vehicle is OFF.
• The service bay test is not active.
• A refueling request is not detected.
• The battery voltage is greater than 10 V.
• The vehicle speed is less than 4.8 km/h (3 MPH).
• There are three possible time windows for this test to run. Up to that point and through this time period the propulsion system must not be active. These time windows are: 5.0, 7.0 or 9.5 h.
• The DTC runs once per drive cycle and immediately after a code clear when the above conditions are met.

P0452 and P0453

• Vehicle ON or the engine is running.
• DTCs P0452 and P0453 run continually when the above conditions are met.

P0454

• The test can only execute up to once per propulsion system off period.
• The length of the test is determined by the refueling rationality test, which can take up to 10 min to complete.
• The barometric pressure (BARO) is between 70 - 110 kPa (10 - 16 PSI).
• The fuel level is between 10 - 90%.
• The engine coolant temperature (ECT) is less than 40°C (104°F).
• The intake air temperature (IAT) is between 4° - 45°C (39° - 113°F).
• The battery voltage is greater than 10 V.
• The vehicle speed is less than 4.8 km/h (3 MPH).
• The propulsion system is not active.
• The service bay test is not active.
• There are three possible time windows for this test to run. Up to that point and through this time period the propulsion system must not be active. These time windows are: 5.0, 7.0 or 9.5 h.

P1464

• DTCs P0442 P0443 P0452 P0453 P0455 P0458 P0459 P0497 P145D P1463 P2400 P2401 P2402 P2418 P2419 P2420 P2450 P24B9 P24BA P24BB is not set.
• The propulsion system is active.
• The barometric pressure (BARO) is between 70 - 110 kPa (10 - 16 PSI).
• The outside air temperature (OAT) is between 4° - 35°C (39 - 102°F).
• The fuel level is less than 90%.
• The engine RPM is between 1400 - 4100 to enable.
• The engine RPM is between 1160 - 4000 to re-enable.
• The engine vacuum is between 8 - 41 kPa (1.1 - 5.9 PSI) to enable.
• The engine vacuum is between 9 - 40 kPa (1.3 - 5.8 PSI) to re-enable.
• The engine airflow is between 9 - 34 gps to enable.
• The engine airflow is between 9 - 32 gps to re-enable.
• The purge flow is greater than 0.26 gps to enable.
• The purge flow is greater than 0.27 gps to re-enable.