The EVAP purge soelonid
Here's code P0442. P0442 OBD II Trouble Code here's code p0328 P0328 Knock Sensor Circuit High Input
SOURCE: dtc po328 and po442
The P0328 is a knock sensor code. Most likely cause is the knock sensor itself. But it is possible that the wiring harness has a short in it. Replace knock sensor.
The P0442 is an EVAP small leak code. This one can be more tricky as there are a ton of things that can cuase this code. First thing to try is hte gas cap. Even though it is a small leak code and not a gross leak code, the cap can still be the cause of the fault. Also a Nissan fuel cap is all that should be used. No Stant or other aftermarket caps. Thay can give you trouble. If the problem is still present and you are sure the cap is properly sealing. You really need to go to a shop that can "Smoke" the system to find the source of the leak. This is not something all shops can do and the at home shade tree mechanic can't either unless they have the very expensive smoke machine. Basically you are trying to find a source of the slightest little leak in the EVAP system that is locates somewhere between the rear bumper and the front bumper. It's like looking for a needle in a haystack. Having a smoke machine is like looking for that needle but having an cartoon ACME strength industrial electro-magnet to assist you in finding that needle.
I doubt the EVAP problem is causing the rough running. The knock sensor code means the knock sensor noted a severe vibration. The cylinder 4 code could mean the miss has become bad enough to trigger a code for one cylinder.
I would look at the injectors and for a vac leak. And the spark plugs can be firing in air but not inside the cylinders under pressure.
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