have an issue with ecu code 21 (knock sensor failure). comes on intermittently, even at an idle. if I shut the sled off, wiggle wire connection near ecu, it will go away for a day or so. progressively getting worse. it is not detonation as it does it at idle. it is somewhere between the sensor, and the ecu pinout plug. guessing chafed wire, or loose pin plug. help is appreciated 2009 m8 sno pro, non ho 800 Suzuki motor. looking for a wiring diagram to help trace the wire, so i can make a jumper, and test my chafed wire theory. Ski
