Just had this error come up: P1518 Starter switch circuit low input. Reported as "low battery" in the dealer readout, though the battery is at top health, they say. Any thoughts on what could have caused that code since the battery is in good condition? It happened just after filling up (then the CEL came on with flashing cruise control, I figured loose gas cap at first). Odd, though it has been pretty warm here as of late---still not as warm as it was last year, though.