2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 3277

YES

The measurement value is OK.Further possible causes of fault

- Inspect plug connections for corrosion, pinched insulation and loose contact.

- Replace component B4/7 (Fuel pressure sensor).

End of test

NO

The measurement value is not OK.Possible cause and remedy

- Repair / replace faulty wiring between N118 (Fuel pump control module) and B4/7 (Fuel pressure sensor)

End of test

2. No further information available.

254000

The signal of the fuel pressure sensor for the low pressure circuit is implausible.

Test 1: Check component Fuel pump.

Test 2: Possible cause:

- B4/7 (Fuel pressure sensor)

Affected functions:

- Engine diagnosis

- Fuel system

1. Check component Fuel pump.

Test 1.1: Test fuel pressure and internal leaks of fuel system.

1.1. Test fuel pressure and internal leaks of fuel system.

Warning!Communication with ECU required.

2. No further information available.

254100

The fuel pressure sensor of the low pressure circuit has a short circuit to ground.

Test 1: Check component B4/7 (Fuel pressure sensor).

Test 2: Possible cause:

- B4/7 (Fuel pressure sensor)

Affected functions:

- Engine diagnosis

- Fuel system

1. Check component B4/7 (Fuel pressure sensor).

Test 1.1: Check component B4/7 (Fuel pressure sensor) using actual value.

Test 1.2: Check power supply of component B4/7 (Fuel pressure sensor).

Test 1.3: Test wiring to component B4/7 (Fuel pressure sensor).

1.1. Check component B4/7 (Fuel pressure sensor) using actual value.

Warning!Communication with ECU required.