Help 2012 Hyundai Genesis sedan 4.6 battery light on

[awcapitini1970]

Hello Everyone my first message board iam ever using lol. Hi have a 2012 Hyundai Genesis 4.6 Sudan. My battery light is on it seems like the alternator is not charging While running. Is there a separate voltage regulator or is the voltage controlled by the computer?

 

[Sal Collaziano]

Hello Everyone my first message board iam ever using lol. Hi have a 2012 Hyundai Genesis 4.6 Sudan. My battery light is on it seems like the alternator is not charging While running. Is there a separate voltage regulator or is the voltage controlled by the computer?

Welcome. Moving this to the Genesis Sedan section.

 

[dlevitt]

I had this issue with my 2011 4.6. I had the alternator replaced and fixed the issue.

 

[LarryK]

I had this issue with my 2011 4.6. I had the alternator replaced and fixed the issue.

yep I did the same .A year after replacement and runs great average voltage14.6- 14.7

 

[Gunkk]

Battery light = alternator. DIS will also show the "don't run the entertainment system while car is off" warning periodically.

Voltage regulator is inside the alternator.

Same symptom on my car, replaced my alternator under HPP Platinum warranty. Been fine since.

 

[AgentSmith007]

Yep, it is alternator. Got battery light on early March. Alternator was replaced. All good now.

 

[zeeball]

Hello Everyone my first message board iam ever using lol. Hi have a 2012 Hyundai Genesis 4.6 Sudan. My battery light is on it seems like the alternator is not charging While running. Is there a separate voltage regulator or is the voltage controlled by the computer?

May 2011 with 80,000 mi. had the alternator fail as well. Replaced it.

 

[Shady_panda]

make sure you use OEM, I had an aftermarket one which was still throwing code and failed a year later.

 

[jjstolarik]

make sure you use OEM, I had an aftermarket one which was still throwing code and failed a year later.

What code did it throw? Or did the battery light stay on? I have an ‘09 4.6l and I just replaced the battery & alternator. The battery light is still on and the voltage is only 13.9V coming from the alt.

 

[Shady_panda]

What code did it throw? Or did the battery light stay on? I have an ‘09 4.6l and I just replaced the battery & alternator. The battery light is still on and the voltage is only 13.9V coming from the alt.

battery light not code...it comes on and off and then died

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[mtrot]

Yes, my light recently came on, thought I probably needed a new battery since it was several years old. But the battery checked out okay. Took it to a shop and they said it needed a new alternator. Of course, the alternator for a 4.6 is rare, so the price for just the alternator was ~$500. The new alternator fixed the problem.

 

[zeeball]

Yes, my light recently came on, thought I probably needed a new battery since it was several years old. But the battery checked out okay. Took it to a shop and they said it needed a new alternator. Of course, the alternator for a 4.6 is rare, so the price for just the alternator was ~$500. The new alternator fixed the problem.

These alternators must expire about the same time. My 2011 went out last year. I got a cheaper rebuilt one from eBay, but I I had difficulty getting it to mount, as the mounting bolts must line up precisely.

 

[Gunkk]

10 model years is a good lifetime for an alternator. Doesn't matter what car it's on or who made it. Honda, Toyota, Lexus, Hyundai, Chrysler, Chevy, Ford... doesn't matter. They're light bulbs, and sooner or later they will fail. Most tend to go around 8-10 years and 80-200k miles. YMMV

With Genesis sedans the OEM parts are single source / monopoly priced just like everything else on our cars: expensive to fix.

 

[PagoBay]

Would the alternator have any effect on the power steering? My light came on about 3 days ago and this morning I had a difficult time turning into the parking lot at work. Steering wheel seemed to be resisting me. Wondering if this issue may be related to the alternator or if I have 2 separate problems.

 

[Gunkk]

Yes.

Would the alternator have any effect on the power steering?

Absolutely.

 

[G-672876]

Yes.


Absolutely.

Thank you for the response!