Home >> Land Rover >> 2015 >> LR2 Base >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index GTDI 2.0L Petrol, DTC: Engine Control Module (ECM) -- LR2/L359 >> Diagnostic Trouble Code Index GTDi 2.0L Petrol, DTC: Engine Control Module (ECM) >> Description And Operation >> DTC P06B6-21: Internal Control Module Knock Sensor Processor 1 Performance - Signal amplitude < minimum >> Possible Causes