Impreza WRX STI

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

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 32,000 (32,000–32,000)
Engine affected: 2.5L 4 Cylinder Turbo
7 model years affected: 2004, 2005, 2006, 2007, more2008, 2009, 2010
9 people reported this problem
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low voltage knock sensor. crazy sporadic readings pulling timing and lowering DAM replaced