Conditions For Setting DTC
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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, more than 15,000 mm3 at 800 RPM, or more than 38,000 at 2000 RPM.