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melissaswift79

Sonata Battery Issues

Hi, I have a 2015 Hyundai Sonata with a diesel engine and I'm experiencing some battery issues. The car has 136165 km. I'm getting an error message in the speedometer, weak lights, and it's struggling to start. I pulled the error codes and there were errors related to low voltage. Any ideas?

Summary of the thread

A 2015 Hyundai Sonata with a diesel engine is experiencing battery issues, including error messages, weak lights, and difficulty starting, with error codes indicating low voltage. The problem could stem from a faulty battery sensor, as suggested by a similar past experience. The solution involved checking the charging system and replacing the faulty sensor, which resolved the issue.

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4 comment(s)

louis_eule1

Sounds familiar. I had similar issues with my Sonata. Are you sure the battery terminals are clean and tight? Could be a bad connection. Is the battery relatively new?

melissaswift79 (community.author)

Terminals look okay, no corrosion. The battery is maybe 3 years old. Could it be the battery itself, or something else draining it?

louis_eule1

Could be the battery, but in my case, it turned out to be a faulty battery sensor. That was causing the low battery warnings and eventually a dead battery. I'd suggest having a workshop check the charging system and the sensor.

melissaswift79 (community.author)

Thanks for the suggestion. I had it checked out and you were right, it was the battery sensor. Repair including parts and labor came to 315€. All good now!

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HYUNDAI

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SONATA