Diagnostic Aids: P0088

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

This DTC will set if the electric fuel prime pump runs continuously during engine operation (van only).
If the fuel system pressure is actually too high, a fuel knock will exist.
A sticking FRP regulator may cause this DTC to set.