Hello everyone!

I just found this list and I'm excited! I own a 97 Impreza Outback Sport 2.2L with 212,000 miles on it. It still rocks but I just had it inspected and the Knock sensor code has come up. So I have two questions:

 

(1) What does a knock sensor do? How does it's malfunction affect me?

 

(2) Where do I find the knock sensor on this engine?

 

 

TIA,

Cheers,

Dave.

knock sensor detects knock and retards timing depending on input.

 

located on top the motor, typically under the throttle body somewhere, not sure on your specific model (eventhough i have a 97 OBS!).

 

typically the connection just gets corroded, dirty or not seated right. check the connector (wiring side) and the sensor for dirty contacts and clean it up. or replace the sensor. (a used sensor would probably do fine, new ones can be steep and they don't fail all that often). or get a new one if you don't mind.