Check engine is on all the time. Battery light
blinks sometimes 1 time sometimes 5 times even stays constant for a few seconds. I worreid it may be my alternator. The battery is pretty new, changed it last july. i put jumper cables in case my car does die on the road. The stranmge part is autozone told me the check engine light is from a IAT sensor. Which has to do with emissions. I undid my battery one night, then drove a diffrent car for the way to work. When i woke up i hooked the battery back up drove for a bit and the battery light still blinks are stays constant.