Supply Pressure – Fuel system
Check the circuit components, connectors and electrical cablesCheck the overflow valve and the fuel return.
What you'll see
No driver-visible symptom recorded.
System reaction
The fault code will only be generated if the supply pressure is above the permissible pressure for at least 7 seconds. The time limit has been set so that the fault code will not be generated in the event of a brief pressure deviation which is not caused by a fault.If the voltage is outside the permitted range, the control unit uses a preprogrammed value.The maximum engine torque is limited by approximately 30% as long as the fault is active. The fault may cause the engine to run unevenly and emit smoke.
Diagnostic depth
The feed pressure has been implausibly high in comparison with the nominal pressure for various operating conditions.
The fault is probably caused by a defective overflow valve. It may also be due to a clogged fuel return.