Many thanks Autotechpat,
Right where you said. Engine is pinging under load and the code said knock sensor.
If you don't mind a general question for you- this engine with approx 147K has had what I call a piston slap sound for about the last 20K miles. Its really load when it is cold out and you first start the car. Once the car warms up the slapping nosie goes away. I cal it piston slapping because I am assuming that this is exactly what it is. My logic is that when it is cold the rings are slapping against the worn cylinders. Once the engine warms up and the rings expand, the noise goes away.
My question is this-is this common with the 2.5 L engine?
My plan is to just let the wife keep on driving it.
Your thoughts on this?
Thanks again for all fo your help.