Engine Mechanical problem
1999 GMC Jimmy 6 cyl Four Wheel Drive Automatic 125000 miles
I turned on ignition and no power to fuel pump, I hooked up red test wire and no power at fuel pump, I inspected wire harness from fuse panel to pump and see no obvious signs of wear, connectors fit snug. Fuel pump relay checks out ok. Hooked up scanner and get codes: P0452 & P0001. Would a faulty fuel regulator or fuel pressure sensor prevent the fuel pump from working? How would I correct these faults and what else should I check for the fuel pump?
Tuesday, December 29th, 2009 AT 8:02 PM