Knock Control Self Test Zero Pulse Fault Drive Cycle A

DTC P0606
Knock control self test zero pulse fault Drive cycle A:Signal implausible.

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.