Knock recognition control limit, checking: Notes

The following tests should be performed when a DTC is stored that relates to "knock recognition control limit reached". Also check the measuring value blocks for ignition angle retardation: Refer to Measuring value blocks for ignition angle retardation .

	Possible cause	Corrective action
DTC for all cylinders	Poor fuel quality	Change fuel quality. Refer to Owner's Manual
or Cylinder 1/2 or 3/4	Knock sensor tightened to incorrect torque	Loosen knock sensors and tighten to 20 Nm
	Knock sensor faulty	Check knock sensor. Refer to Knock sensors, checking
	Corrosion at harness connector	Check harness connector
	Engine accessories loose	Secure engine accessories
DTC for one Cylinder	Engine damage	Check compression pressure
	Engine accessories loose	Secure engine accessories