Question

This code is on my 1997 Nissan Pickup. Any additional input would be appreciated

Answer 1

If you have the P0303 code: 

What other information would you like to know? Please look a "Possilbe Causes" on the page and start by inspecting or changing the parts. You should start with the spark plugs and cables.

P0303 Nissan - Number 3 Cylinder Misfire Detected

 

Read more: https://www.autocodes.com/p0303_nissan.html