Diagnostic Aids

Using scan tool, rock vehicle back and forth while monitoring fuel level voltage. Voltage should fluctuate. If voltage is not fluctuating, check for a stuck fuel sender assembly or damage fuel sender float. An intermittent condition may be caused by poor connection, rubbed-through insulation, or a broken wire inside insulation. Check PCM harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, or poor terminal-to-wire connections before component replacement.