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Thanks for posting
which battery was replaced? The 12 volt auxiliary or the HV battery?
Thanks for the reply,
The real problem here is the check engine light being on, whenever that happens the hybrid vehicle computer has trouble communicating with the engine control system and that's why the red triangle light turns on, so the priority here is to find out why the check engine light is on and then go from there.
Most auto parts stores like Autozone or O Reilly can scan the engine computer and give you the code information and they do this at no charge, after you have this information you can reply back here to me and I can figure out what the cause of this is. There is no urgency and you can reply tomorrow or later if you need more time.