GM Coddes now What do I do

I got the codes now I need to know what to do next change crank psition sensor? plug wires?
P0102 MAF sensor circuit low freq P0300 Engine misfire detected
P0304 cylinder 4 misfire
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Tom wrote:

Tom, you'll probably get better advice if you identify the vehicle in question.
---Bob Gross---
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.