[nissandoc]

Knock Sensor Codes Are Common But Will Not Turn The Check Engine Light On. The Lights On For The Egr Code. Usually On A Quest An Egr Code Is The Bpt Hose. Look For A Metal Tube Just Above The Egr Valve That Has A 3-4 Inch Section Of Hose With A 90 Degree Turn. It Connects To The Bottom Of The Bpt Valve, If Its Split Open, Replace It. As For The Knock Sensor, Dont Worry About It, Its Not Worth The Cost To Replace It, And The Egr System Not Working Properly Will Sometimes Set This Code.