Question

How can I know which coil I need to replace in a 2002 Nissan X-Trail code P0350?

Answer 1

You can't find out just with that code. You must perform some test with an oscilloscope to find the bad coil (s) or you could wait until you get another code that will indicate the faulty coil.

P0350 NISSAN - Ignition Coil Primary/Secondary Circuit Malfunction
Read more: https://www.autocodes.com/p0350_nissan.html