Q: check gas cap light keeps coming on 300 miles on 2002 Ford Ranger

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
changed gas cap several times. reset engine keeps repetting after several 100 miles.
(2) Answers
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Could it be another evaporative emission control system problem, masking itself as a gas cap problem? Is the gas cap sealing area on the filler neck un damaged?
Try replacing your gas cap with a new dealer gas cap, not an after market one. It should help this situation.