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2004 Subaru Impreza Check Engine Light Due to Failed Knock Sensor

The Check Engine Light may illuminate because of a failed knock sensor . Although the sensor often tests okay, it can fail intermittently, while the vehicle is being driven.

Affected Model Years

This issue affects Subaru Impreza model years 2004, 2005, 2006, 2007, 2008, 2009, 2010, .

9 people reported this problem

  • 2004 32,000 Miles
    low voltage knock sensor. crazy sporadic readings pulling timing and lowering DAM replaced

Subaru Impreza 2004 Common Problems