Checking the fuel pressure

This function is a test that checks and reads out the engine's fuel pressure. The fuel pressure is periodically read out from the after-treatment fuel pressure sensor. During this sequence, a snapshot of the fuel supply pressure is made. The pressure is read when the after-treatment hydrocarbon dosing valve is closed and the fuel cut off valve is open.
Note:
If the reading of "Aftertreatment fuel pressure" is lower than "Fuel supply pressure, low limit", a fault code with low fuel pressure will be set.
Test conditions:
Procedure:
  1. Press the "OK" button to start. The test is performed automatically.
  2. Check the read values.
  3. The function is done.