Detonation Alarm Appeared For Gas Engine G3520

Hi friends, i have question here. My gas engine having a problem with Detonation alarm. It caused trip of my engine. Based on histories in CAT tool was mentioned that detonation alarm happen at few of cylinder, not at all. Some of checking had been done such check the harness, swapping the sensor. But this problem still unable to solve. I looking for your advise what is other way to solve this problem. Any further infomation that you guys need please do not hesitate to let me know. Hopefully it could be solve as soon as possible. Thanks in advance.