4.22.1 Description

When all of the entry conditions have been satisfied, the input signals from the two knock sensors are checked against variable upper and lower threshold levels that are dependent on engine speed. If either sensor input is outside the threshold, then a failure will be flagged. If a failure is noted on two drive cycles the MIL will illuminate.

Fig 1: Knock Sensor (Diagnostic Trouble Codes P0327, P0328, P0332, P0333)

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Fig 2: Knock Sensor Low Limit Chart

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Fig 3: Knock Sensor High Limit Chart (1 Of 2)

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Fig 4: Knock Sensor High Limit Chart (2 Of 2)

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