125000720 - X01 EXCESSIVE FUEL CONSUMPTION

The engine appears to running smoothly, but the fuel consumption is higher than previously recorded during the life of the vehicle. Warning: The consumption data in the vehicle technical documentation has been defined during the course of homologation tests. These tests simulate an urban cycle and an ''average'' extra-urban cycle and therefore may not be indicative as consumption depends very much on the style of driving.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation

Check the conditions:

  • Of the air filter;
Of the fuel filter.
Check the exhaust circuit, paying special attention to any obstructions in the pipes
Continue to Step 1Filter element dirty or damagedReplace the filter element Op.    Op. 1048A14 AIR CLEANER FILTERING ELEMENT - REPLACE.
Fuel filter dirtyReplace the filter element Op.    Op. 1044B20 FUEL FILTER FILTERING ELEMENT - REPLACE
Exhausts obstructedReplace the complete exhaust pipe Op. 1076B12
Exhaust system obstructedReplace the defective system component
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the Examiner diagnostic equipment to the diagnostic connector and check the engine conntrol node:

  • For faults in error mode;
  • For plausibility of all parameters in parameter mode;
Continue to Step 2An error is detected in the control unitContinue following the instructions for the diagnostic equipment
2HIGH PRESSURE CHECKAll OKProblems metOperation
Check the fuel supply circuit, high pressure side, by carrying out the See Test    See Test 1060D ELECTRONIC DIESEL INJECTION CONTROLContinue to Step 4Pressure not correct: pressure regulator faultyReplace the pressure regulator Op.    Op. 1060E50 PRESSURE REGULATOR - R R
Pressure not correct: injector manifold faultyReplace the manifold Op.    Op. 1060F30 FUEL DELIVERY MANIFOLD - R R
Pressure not correct: injectors faultyReplace the injectors Op.    Op. 1060F10 FUEL INJECTORS
Pressure not correct: pipe from pump to manifold faultyReplace the pipe Op.    Op. 1060F20 PRESSURE PUMP/MANIFOLD PIPE - R R
Pressure not correct: pipe from manifold to injectors faultyReplace the pipe Op.    Op. 1060F36 LINES TO INJECTORS - R R
3LOW PRESSURE CHECKAll OKProblems metOperation
Check the fuel supply circuit, low pressure side supply See Test    See Test 1060B LOW FUEL PRESSURE SUPPLY CIRCUIT CHECKand return See Test    See Test 1060A LOW RETURN FUEL PRESSURE CIRCUIT CHECKContinue to Step 4Pressure not correct: fuel filter faultyReplace the fuel filter Op.    Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE
Pressure not correct: electric pump faultyReplace the electric pump Op.    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GUAGE CONTROL - R + R
Pressure not correct: return manifold faultyReplace the manifold Op.    Op. 1060F50 FUEL RETURN MANIFOLD - R R
Pressure not correct: fuel return pipes faultyReplace the pipes concerned
4Continue as instructed by the testerAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.