3022660 - 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 on the version with low line instruments, while it stays off on versions with high line instruments.
The CODE warning light going out (not coming on in high line versions) means that the dialogue between the two control units has gone well.
Results of the tests
1CHECKING 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 2Error detected in the control unit Continue according to the instructions for the diagnostic equipment
2CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'