Conditions for Running the DTC

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. 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