fuel level/check engine light on Amigo

The fuel level indicator on my '98 Amigo varies wildly (1/2 a tank often reads full) and the check engine light is on. Motor runs well, emissions
control system is OK, vehicle tuned up recently. Could a faulty fuel level sending unit be violating a code/causing check engine light to be on?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

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.