You need to find out when your warranty started. Ford warranty on the hybrid battery is 8 yrs/100000 miles. This may be covered under warranty. What is the error code associated with the wrench light? Ford should have read that or auto zone etc. should be able to read it for you and give you a print out. I have a 13 that fell out of warranty last dec. that's giving me battery cooling fan errors P0A82. Hybrid battery pack cooling fan 1 performance or stuck off. I'm trying to decide if I take it to ford or someplace else. Battery performance hasn't been compromised yet.