125000506 - D35 LOW ENGINE OIL PRESSURE

The warning light indicates a decrease in pressure in the engine lubrication circuit.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Check that the engine oil level is correctCheck the condition of the oil sump and ensure there are no external macroscopic leaksContinue to Step 1Oil level lowTop up the engine oil level
1CHECKING OIL PRESSURE SENDING UNIT SENSORAll OKProblems metOperation
Check the sending unit and wiring are working properlyContinue to Step 2Sending unit faultyReplace sender unit
Wiring short circuitedArrange wiring
2CHECK LUBRICATION SYSTEM PRESSUREAll OKProblems metOperation
Check the pressure of the lubrication system Op.    Op. 0510C20 LUBRICATION SYSTEM - CHECK DELIVERY PRESSUREContinue to Step 3Pressure lowWith the oil sump removed, check the pressuer limiter valve. If OK, check the oil pump. If the pump is also OK, carry on toContinue to Step 3
3CHECK ON LUBRICATION SYSTEMAll OKProblems metOperation

Check:

  • seal of crankshaft channel plugs
  • main bearing/connecting rod bearing clearance
Continue to Step 4Caps faultyReplace the plugs
Excessive clearanceReplace the bearings
4CORRECT OPERATION CHECKAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom''