Conditions for Setting the DTC

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

After an EVAP leak detection pump switching valve delay time of 0.2 s the EVAP leak detection pump pressure sensor indicates a vacuum change less than 1.05 kPa (0.15 PSI) for 20 s, then a low purge flow failure has been detected..