check engen lite code0443 willnot clear on 2007 Chevrolet Cobalt

replaced gas cap and purge slonoid

Asked by for the 2007 Chevrolet Cobalt
then it could be:
wiring harness chafing or rubbing another component causing short or open on control circuit;
connector worn, broken or shorted due to water intrusion;
or driver circuit inside PCM is bad