184000528 - K50 I.E. FAILURE WARNING LIGHT ON

The engine management control unit warning light remains on. The CODE warning light comes on and goes out.
The CODE warning light going out means that the dialogue between the two control units has gone well.
Results of the tests
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check that there are no errors in the control unitContinue to Step 2An error is detected in the control unitContinue according to the instructions for the diagnostic equipment
2CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsContinue as instructed See table B10 ENGINE DOES NOT START