21135696 Volvo.Penta Oil return pipe

Table 1
Event Code
Code and Description Conditions which Generate this Code System Response
E198(1) Low Fuel Pressure The fuel pressure is below the trip point pressure. The code is logged. The engine's Electronic Control Module (ECM) will illuminate the check engine lamp.
E198(2) Low Fuel Pressure The engine power is derated. The code is logged.
The ECM will illuminate the check engine lamp. The ECM will pulse the action lamp at a rate of .5 Hz per second. Probable Causes
Fuel Supply
Fuel supply valve (if applicable)
Improperly operating fuel pressure regulator
Fuel level
Blockage of the vent port on the fuel cap
Proper operation of the electric fuel priming pump
Diagnostic codes for the fuel pump relayFuel Pressure Sensor
Diagnostic codes for the fuel pressure sensorRecommended Actions
Fuel Supply Valve (if applicable)
Ensure that the fuel supply valve (if equipped) is in the full OPEN position.Improperly Operating Fuel Pressure Regulator
An improperly operating fuel pressure regulating valve may cause low fuel pressure. If a problem is suspected, inspect the return fuel pressure regulating valve. Clean any contamination or debris that may keep the regulating valve from operating properly. If debris is present, find the source of the contamination. Replace the return fuel pressure regulating valve if the valve is worn or damaged.Fuel Level
Visually inspect the fuel level in the fuel tank. Ensure that the fuel tank contains enough fuel in order to operate the engine.Blockage of the Vent Port on the Fuel Cap
Remove the fuel tank cap from the fuel tank. Check the vent port that is in the cap for debris. Clear any restrictions with compressed air.Note: Do not allow debris to enter the fuel tank while you clean the cap. Damage to the fuel system will occur.Proper Operation of the Electric Fuel Priming Pump
The electric fuel priming pump provides the fuel to the low pressure fuel system. When the keyswitch is turned to the ON position, the electric fuel priming pump runs for two minutes. This should prime the fuel system. If the fuel system is not fully primed, turn the keyswitch to the OFF position and repeat the sequence.When the engine is cranking or running the electric fuel priming pump will run continuously. There is no fuel transfer pump in the unit injector hydraulic pump.Prime the fuel system if any of the following procedures have been performed:
Replacement of the fuel filters
Service on the low pressure fuel supply circuit
Replacement of unit injectorsStart the engine. Run the engine at low idle. Use Cat ET to monitor the fuel pressure for the engine.Check the value of the fuel pressure while the engine is at low idle. Ensure that the value of the fuel pressure is reasonable. If the value of the fuel pressure fluctuates, there may be blockage to the intake side of the electric fuel priming pump.Inspect the lines to the electric fuel priming pump. Check the fuel lines for the following: kinked fuel suction line, collapsed lines and contamination.Diagnostic Codes for the Fuel Pump Relay
Use Cat ET to check for diagnostic codes for the fuel pump relay. If diagnostic codes for the fuel pump relay are logged or active, refer to Troubleshooting, "Fuel Transfer Pump - Test".Diagnostic Codes for the Fuel Pressure Sensor
Check for active diagnostic codes for the fuel pressure sensor. If diagnostic codes for the fuel pressure sensor are logged or active, refer to Troubleshooting, "Sensor Signal (Analog, Active) - Test".