I have had the check engine light on for about 3-4 weeks now. Collant temp sensor and KS. It went off yesterday and hasn't come back on, should i replace the KS and Coolant sensor or wait to see if they come back again? Did the ecu just give up on me or could they have been ghost codes?

 

replace coolant temp sensor first. 0304 should go away..if not replace KS