Examination
1. The circuit between the sensor output and its housing must not be short-circuited. Otherwise, replace the sensor.
Replacement
1. Disconnect the battery from the ground.
2. On a cold engine, drain 3-4 liters of fluid.
3. On 6-cylinder engines, remove the intake manifold (see subsection 3.2.5.).
4. Disconnect the connector and remove the sensor. On 6-cylinder engines, the knock sensor is mounted under the intake manifold.
5. Tighten the new sensor to 36 Nm (sealant on the threads of the new sensor is applied by the manufacturer).