2003 toyota matrix rough idle

Cool. Glad you got your car properly diagnosed and back on the road.

well it seems to be running good but we kicked a new code last night, PO325 knock sensor. it says open or short circuit condition or faulty knock sensor. Haven’t done too much reading on this one yet but I hate to just dig in and replace a difficult to reach sensor without knowing for sure that is the problem… any thoughts?

The knock sensor is on the front of the engine block. Looks like this:

Make sure it’s there and plugged in.
Might be hard to reach without removing the intake manifold.
I don’t have my car around to check on that.