I have a 2017 Volvo XC 60 with a 140,000 miles. New Battery. Alternator is putting out 14.8 volts. The battery warning light only comes on sporadically when the car is in accessory mode or when I just shut it off. I replaced the auxiliary battery but the light keeps coming on as it was before. I tried a manual reset that I read about on line. Nothing changed. Any ideas of what I can try next? thanks in advance.