noahfox43
Sonata Hybrid Terminal 30 Error Rough Start
Summary of the thread
A 2023 Hyundai Sonata Hybrid was experiencing a 'Terminal 30 continuous plus interrupted' error and rough starting. The issue was suspected to be related to the battery, as a defective or heavily discharged battery can cause such errors in hybrid vehicles. After testing, the battery was found to be faulty and was replaced, resolving the error and improving the car's starting performance.
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4 comment(s)
noahfox43 (community.author)
Yeah, sorry I wasn't more specific. It's definitely extended cranking - it takes a few tries sometimes. And no, I haven't had the battery tested, but that's a good call. Could a bad battery really cause that specific error code though?
evafox1
Yes. A heavily discharged or defective battery can indeed cause the 'Terminal 30 continuous plus interrupted' error, particularly in hybrid vehicles with complex energy management systems. Given the age of the battery and your description, proceeding with a professional battery diagnostic and replacement if indicated is highly recommended.
noahfox43 (community.author)
Thanks! I had the battery tested, and it was indeed toast. Replaced it, and the error is gone, starts like new. Repair bill came to 290€ including the new battery. Appreciate the help!
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HYUNDAI
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SONATA
evafox1
Regarding the symptoms you describe, could you please provide more context? When you say 'starting rough', do you mean extended cranking time, or a weak-sounding starter motor? Also, have you had the battery load tested?