I have a question , about a year ago i replaced a bad knock sensor and car ran fine with no codes. Recently i decided to fill up with 100 octane fuel to try out on a 4wd trip as soon as i was on the beach and giving the hilux a bit the codes came up for both knock sensors . After refueling on lower octane and ressetting ecu , codes still remained i then thought possibly faulty wiring surely both knocksensors couldnt go at once . So after stripping down motor and checking wiring and knock sensors i found that both knock sensors were faulty. After replacing both knock sensors every thing is fine and now i am too scared to use 100 octane fuel . Has anyone else had this experience or is it one of those unexplained weird coincidence things. Any feed back would be appreciated.