check engine light 2003 ranger

[jeffrey5679]

anyone have this problem? my check engine light comes on when the gas tank gets to 3/4 to 1/2 tank. when i fill up it turns off. the truck seems to run great other than the check engine light it has no problems. 44k miles on motor.

 

[stmitch]

Do you know what the CEL code is that's being triggered? It's probably an evap/emissions related but it would help quite a bit in determining a possible cause.