Fault code: 4745 SCANIA

Error identification:

The feed pressure has exceeded a limit value for a certain period.

Cause:

Possible causes:

• The fuel supply pressure sensor indicates incorrect values.

• Fault in the overflow valve.

• Fault in the circuit of the charge air pressure sensor, charge air temperature sensor, coolant temperature sensor or fan speed sensor.

Notes:

There is a common voltage supply for the fuel supply pressure sensor, coolant temperature sensor, charge air pressure sensor, charge air temperature sensor and fan speed sensor. If a fault occurs in one of the sensors, the other sensor circuits may be affected.

The fuel shut-off valve cuts off the fuel supply as long as the supply pressure is above the limit value. If a fault has been detected on the sensor, the fuel supply is not cut off.

Action:

Check the fuel supply pressure sensor, coolant temperature sensor, charge air pressure sensor, charge air temperature sensor and fan speed sensor, along with the harness-to-harness connectors and electrical cables in the circuits.

Make sure the overflow valve is opening.