Web• erratic fuel pressure (low fuel pressure should not be fault traced using this procedure) • diagnostic trouble codes set for low fuel pressure or injector if one or more of the fuel. Webvisual inspection of fuel sample. Allow the vehicle to sit on a reasonably level surface with the engine off or at least one hour to give fuel tank content a chance to settle. Webvolvo trucks has identified through remote diagnostics that the vehicles in this service campaign have experienced faults with the electronic pressure relief valve (eprv). Webtwo valves are located in the supply pump (1). The safety valve (11) allows fuel to flow back to the suction side when the pressure becomes too high, e. g. , if the fuel filter is.
