Check Engine Light Due to Failed Knock Sensor on Subaru Impreza Outback

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: 148,000 (148,000–148,000)
Engine affected: 2.5L 4 Cylinder
5 model years affected: 2000, 2001, 2002, 2003, more2004
7 people reported this problem
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