Not impl: IIlegal software operation
â–¶ How to fix
No action is needed if DTC is set a few times (1-5). If set frequently, replace ECU.
What you'll see
Brief function disturbances may be experienced.
System reaction
The system performs software reset under some circumstances.
Diagnostic depth
Detection
The ECU software continuously performs checks for unexpected or illigal events, The DTC is set if such an event is detected. E.g. Memory modification outside memory modification time box.
Possible cause
System flaws. Software bugs or Hardware failure.