Hey everyone. So I have 2001 Nissan Pathfinder and I've noticed that it has a light ticking at idle and gets louder as I accelerate. Next day I get THE SES light. I get the infamous P1140 code. I've heard this being called the knock sensor also. Is this a valve that is bad, lifter? Could the sensor or solenoid throw the valve timing out of whack? Thank you all for your help!