Conditions for Setting the DTC
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The difference between commanded fuel pressure and actual fuel pressure is more than 20 MPa.
or
The FRP regulator fuel flow is more than 15,000 mm3 at 800 RPM, or more than 38,000 mm3 at 2,000 RPM.