Some 2022 Camaro, Colorado, Acadia, Canyon, XT5 and XT6 models equipped with the 3.6L V6 engine (RPO LGX, LGZ) may have an illuminated Check Engine MIL along with DTC P0331 (Knock Sensor 2 Performance) set in the Engine Control Module at low mileage. These conditions may be caused by metal around the knock sensor boss on the left side of the engine block that allows contact with the plastic covering the knock sensor. (Fig. 8)
Fig. 8
If these conditions are found, in addition to replacing the knock sensor, check for block flashing (excessive block material) around the knock sensor boss that may contact the knock sensor black plastic. (Fig. 9) If there is block flashing, use a flat or half-round hand file to remove the flashing so it will not contact the sensor plastic. Do not mar the knock sensor mating surface, which may affect the accuracy of the knock sensor readings.
Fig. 9
After removing the flashing and replacing the knock sensor, reevaluate engine performance and ensure the code runs and passes.
Refer to #PIP5836B for additional information.
– Thanks to Aron Wilson
