Conditions for Running the DTC

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

P0451

DTC P0442 = Running
Ignition = Off

Frequency the DTC runs = 2 times - After the running conditions are met

P0452, P0453

Ignition = On

Frequency the DTC runs = Continuously - After the running conditions are met

P0454

Test = Once Engine Off EVAP Test Conditions Met - Small Leak
The procedure will take between 5 and 10 min.
Refueling Event Detected = No For greater than 10 min
Fuel Level Sensor = Change is greater than 10%. - For 30 s - Refueling Detection Test Running