intermitent check engine light

2000 Rodeo, with 4 cyl engine, 130,000 miles, no issues, reggular maint performed, last 100 mile check engine light comes on after laying a smoke screen out the back, then drives fine for a day or so and then does the same
thing. SHop syas nothing wrong, gas milage is the pits, any ideas? Thanks
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.