CEL...code P0325

I have a 1998 impreza outback sport wagon...90,000 miles. Last week my CEL came on...the code was P0325....Knock Sensor Circuit Malfunction". I do notice hesitation at lower gears. What could be the problem? I am afraid to take it the the dealership because of the potential high costs. Can I fix it myself?

I just recently saw a thread about this at the site in my sig, click the logo :biggrin: