P06B7-21: Internal Control Module Knock Sensor Processor 2 Performance - Signal amplitude < minimum: Action
- Check knock sensor mounting bolt is tightened to the correct torque
- Refer to applicable SYSTEM WIRING DIAGRAM(S) and check the knock sensor harness circuit for high resistance
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
- Check and install a new knock sensor as required