Conditions for Setting the DTC

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

The fuel level change is greater than 10 percent.
The above condition is present for greater than 30 seconds.
DTC P0464 runs and fails 2 out of 3 test cycles.