Make sure there is fuel and bleed the fuel system.Check whether any of the overflow valves is opening too early.Check whether the fuel shut-off valve is closed.Check whether the fuel filter is clogged.Check the feed pump.Make sure the fuel system is not leaking.If the fault code is generated while the engine is coasting, i.e. when driving downhill with the accelerator pedal released, you can look at "Stored operational data" under the Supply Pressure tab for help with troubleshooting. If the feed pressure deviation has been -1.0 bar or more during a certain time period, it is a sign that the fuel filter is starting to get clogged. If there is only a slight deviation in supply pressure, this may mean that the overflow valve is seizing.To check that the fault has been rectified:Start the engine and wait for at least 15 seconds. If the fault has been rectified, the fault code becomes inactive. Clear the fault code.Switch the power off and on with the starter key three times in succession at 10 second intervals to extinguish the warning lamp.

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