DTC P06B6-21: Internal Control Module Knock Sensor Processor 1 Performance - Signal amplitude < minimum: Notes

NOTE: LH knock sensor

The engine control module measured a signal voltage below a specified range but not necessarily a short circuit to ground, gain low
Knock sensor mounting bolt is loose
Knock sensor harness circuit, high resistance
Knock sensor connector is disconnected, connector terminal is backed out, connector terminal corrosion
Knock sensor failure