Car Problem Reports

Subaru Impreza WRX STI Check Engine Light Due to Failed Knock Sensor

Subaru Impreza WRX STI Problem
9 Reports
Me Too

Model Years Affected: 2004, 2005, 2006, 2007, 2008, 2009, 2010

Engine Affected: 2.5L 4 Cylinder Turbo


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.

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