The value of sensor B4/15 (Fuel pressure sensor) is implausible. (P0191)

The value of sensor B4/15 (Fuel pressure sensor) is implausible. (P0191)
The value of sensor B4/15 (Fuel pressure sensor) is implausible. (P0191)
Possible cause:
­ B4/15 (Fuel pressure sensor)
Affected functions:
­
Engine running
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Test 1: Check component B4/15 (Fuel pressure sensor).
10.52SS
Page 8692010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 870
1. Check component B4/15 (Fuel pressure sensor).
Test 1.1: Check component B4/15 (Fuel pressure sensor) using actual value.
Test 1.2: Check power supply of component B4/15 (Fuel pressure sensor).
1.1. Check component B4/15 (Fuel pressure sensor) using actual value.
Test prerequisite
­ Relevant fault code exists or there is a complaint.
Test sequence
­ Operate engine at idling speed.
Status of the relevant actual values:
­ Fuel pressure ( Absolute value ):Warning! Communication with ECU required.
­ B4/15 (Fuel pressure sensor) : Specified pressure ( Absolute value ):Warning! Communication with ECU required.
Specified values
­ Fuel pressure=Specified pressure
Question
­
Was the test o.k.?
YES
The test was okay.Possible cause and remedy
­
If the case of stored faults which high fault frequency counter or in the case of customer complaints, inspect electric cables and
connections for loose contact and corrosion.
End of test
NO
The test was not okay.Possible cause and remedy
­ Check power supply of component B4/15 (Fuel pressure sensor).
End of test
1.2. Check power supply of component B4/15 (Fuel pressure sensor).
Test prerequisite
­ The actual value is not o.k.
Test sequence
­ Switch on ignition.
­ Unplug connector of pressure sensor B4/15 (Fuel pressure sensor).
­ Measure direct voltage with multimeter between sockets (B4/15) 1 and (B4/15) 3
Specified values
­ Voltage [4.8 ... 5.3] V
Question
­
Is the measurement value OK?2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
YES
The measurement value is OK.Further possible causes of fault
­ Test signal cable of component B4/15 (Fuel pressure sensor) for Short circuit or open circuit.
­ Inspect plug connections for corrosion, pinched insulation and loose contact.
­ B4/15 (Fuel pressure sensor)
End of test
NO
The measurement value is not OK.Possible cause and remedy
­ Check lines to component B4/15 (Fuel pressure sensor) for discontinuity or short circuit to ground.
­ Inspect plug connections for corrosion, pinched insulation and loose contact.
End of test