97 Nissan p/u truck code po 304

Question

What to do to fix this problem code po304

Answer 1

HI there,

P0304 means there is a misfire on cylinder #4. This could be as simple as new plugs and wires. Or a little more complex such as a problem with a leaking intake manifold gasket or internal engine problem. Most of the time it's best to start with a tune up and clear the codes, then take it from there.