Knock Control Self Test Pulse Fault Drive Cycle A

DTC P0606
^ Knock control self test pulse fault Drive cycle A:Signal out of range - below minimum.

Possible causes:
^ ECM fault.

ECM fault.
CHECK THE FOLLOWING:
^ Check if vehicle has had problems with discharged battery or cutting out. This would indicate a problem with the ECM harness or 12V battery supply.
^ If these problems are not present check ECM by substitution with a known good unit.
POSSIBLE FAULTS
^ Faulty ECM.