DTC P06B6-21: Internal Control Module Knock Sensor Processor 1 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
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
- Check and install a new knock sensor as required