P0562 on Hyundai: How to Diagnose & Fix
System Voltage Low
6 Hyundai models · 6 documented issues · $200-$1,200 repair
P0562 on Hyundai by model: symptoms, diagnosis and fix
The Ioniq 5 suffers from 12V auxiliary battery drain, often leaving the vehicle unable to start. The issue is caused by excessive parasitic draw from always-on systems (telematics, Bluelink) and the 12V battery being undersized for the electrical load. The AGM battery used is more sensitive to deep discharge cycles than conventional batteries.
Common Symptoms
- Vehicle won't start (12V dead)
- Dashboard warning about 12V battery
- Bluelink/remote features stop working
- Clock resets after parking overnight
- Have to jump-start the vehicle
How to Fix
Hyundai released a software update (OTA or dealer-installed) to improve 12V battery charging management. If the battery has been deeply discharged multiple times, it may need replacement (AGM Group 47, $200-300). Keep the vehicle plugged in when parked for extended periods, as the main battery charges the 12V battery. Disable Bluelink remote features if not needed.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- OPTIMA YellowTop DH5 Group 47/H5 AGM 12-volt batteryOEMOPTIMA DH5 / AutoZone SKU 1340240
replacement auxiliary battery after the existing battery fails a proper test and ICCU/parasitic-draw faults are addressed Fitment/availability: AutoZone catalogs Group 47/H5 batteries for 2022-2024 U.S.-market Hyundai Ioniq 5. DH5 is AGM…
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Owner tips & cautions
- TipKeep the vehicle plugged in when parked for more than 2 days - the main battery will maintain the 12V battery charge
- TipDisable Bluelink remote access and scheduled charging in the app if you park the vehicle for extended periods
Sources for this issue (2)
Alternators in Santa Fe models fail prematurely, often between 60,000-100,000 miles. The voltage regulator or rectifier diodes fail, causing undercharging, battery drain, and eventually no-start conditions. Some owners report multiple alternator replacements within the vehicle's life.
Common Symptoms
- Dim headlights at idle
- Battery warning light on dash
- Electrical accessories cutting out
- Car won't start after sitting overnight
- Whining noise from engine belt area
How to Fix
Test alternator output with a multimeter (should be 13.8-14.5V at idle). Replace alternator if output is below 13V. OEM replacement for 2007-2009 3.3L V6 models is generator assembly 37300-3C250-QQH (listed in Hyundai Service Campaign 936); confirm other applications by VIN. Aftermarket options from Denso or Valeo are reliable alternatives at lower cost. Budget $300-600 for parts and labor.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Denso 210-5000 First Time Fit remanufactured 150-amp alternatorOEMDenso 210-5000
replacement alternator after bench/on-vehicle diagnosis confirms alternator failure Fitment/availability: Restrict to catalog-supported Santa Fe V6 applications: 2010-2012 3.5L and applicable 2013-2018 3.3L long-wheelbase Santa Fe/Santa …
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Owner tips & cautions
- TipWhen replacing the alternator, also replace the serpentine belt and tensioner - they are often worn and can cause premature alternator bearing failure
Sources for this issue (2)
The Veracruz 3.8L Lambda V6 has a high alternator failure rate, typically between 60,000-90,000 miles. The internal voltage regulator fails first, causing overcharging or undercharging. Overcharging damages the battery and can blow bulbs, while undercharging causes intermittent electrical problems and eventual no-start. A major cause is oil leaking from the front cylinder bank valve cover gasket onto the alternator, which Hyundai addressed in NHTSA recalls 14V-415 and 20V-705 for 2007-2012 Veracruz. The serpentine belt tensioner also wears, causing belt slip that accelerates alternator bearing wear.
Common Symptoms
- Battery warning light flickering or steady on dash
- Dimming headlights at idle
- Electrical accessories operating erratically
- Battery dying overnight or after short trips
- Whining noise from alternator area that changes with RPM
How to Fix
First check the VIN for open recalls 14V-415 / 20V-705 (Hyundai recalls 121 and 197), under which dealers inspect and repair the front valve cover gasket and alternator at no charge. Replace the alternator with a quality remanufactured unit from Denso or Valeo (OEM suppliers). Replace the serpentine belt and tensioner at the same time — the tensioner pulley bearing commonly fails at the same mileage. Have the battery tested after alternator replacement, as overcharging may have damaged it.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- AlternatorCross-ref210-0712
Fitment confirmed against the ShowMeTheParts catalog for this vehicle's year and engine.
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Owner tips & cautions
- TipReplace the serpentine belt tensioner when doing the alternator — a worn tensioner causes belt slip that kills the new alternator bearing prematurely
- WarningTest the battery immediately after alternator replacement — overcharging from the failed voltage regulator often damages the battery internally
Sources for this issue (3)
The Entourage 3.8L V6 has a high rate of premature alternator failure, commonly caused by the front valve cover gasket leaking oil onto the alternator.
Common Symptoms
- Battery light on dashboard while driving
- Slow engine cranking
- Electrical accessories (radio, lights) dimming
How to Fix
Replace the alternator with a quality remanufactured unit. Check for oil from a leaking valve cover gasket on the alternator and repair the leak, or the replacement alternator can fail too.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Denso 210-0711 remanufactured 130-amp alternatorOEMDenso 210-0711
alternator replacement only after charging-output, ripple and voltage-drop tests confirm alternator failure Fitment/availability: 2007-2008 Hyundai Entourage 3.8L without rear DVD/rear entertainment, 130-amp configuration. Confirm VIN, o…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipAsk the dealer about a body control module software update — Hyundai released a reflash that fixes the parasitic drain from the sliding door modules
- TipIf the van sits for more than 3 days, disconnect the negative battery terminal or install a battery disconnect switch ($15 from Amazon)
Sources for this issue (2)
Kona Electric owners across model years report the small 12V auxiliary battery repeatedly draining, sometimes within weeks, leaving the car completely dead and unable to wake the high-voltage system. Because the 12V system must energize before the main pack activates, a flat 12V battery disables door locks, the dash, and the ability to start or charge. Deep discharges (often after dealer software reflashes done without a charger attached) can permanently damage the battery.
Common Symptoms
- Car completely dead / no response
- 12V battery warning message
- Won't start or wake after sitting
- Repeated dead 12V battery within weeks
- Doors won't unlock electronically
How to Fix
Replace a degraded 12V battery and have the dealer confirm the latest BMS/charging software is installed. Some owners use a battery maintainer or enable available battery-saver functions; persistent unexplained drain should be diagnosed for a parasitic draw at the dealer.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (3)
A recurring Palisade complaint is a 12V battery that goes flat after the vehicle sits a few days, repeating even after the battery is replaced — one owner reports being on a fourth battery. The root cause in the documented cases is a module that fails to go to sleep and holds an excessive parasitic draw; the Body Control Module is the culprit most frequently identified on the forums, with the drain disappearing after BCM replacement. Diagnosis is difficult because the Palisade carries 30+ modules and the standard dealer response is to load-test and replace the battery, which does not address the draw. Aftermarket accessories left in the OBD-II port or 12V sockets produce the same symptom and must be ruled out first.
Common Symptoms
- Battery dead after the vehicle sits 2-5 days
- Repeated battery replacements in a short period
- Slow crank or no-crank after a weekend
- Multiple warning lights and radio/clock reset after jump start
- Elevated current draw with the vehicle asleep
How to Fix
Remove any OBD-II dongle, dash cam hardwire, or 12V accessory and retest — these are the most common self-inflicted cause. If the drain persists, have a parasitic draw test performed properly: let the vehicle fully sleep (20-60 minutes), then measure current and pull fuses one at a time to isolate the offending circuit. Confirmed BCM-caused draws require BCM replacement and reprogramming. Replacing only the battery will not fix it and the failure will repeat.
Sources for this issue (4)
P0562 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0562 mean on a Hyundai?
P0562 stands for "System Voltage Low." P0562 means the engine computer detected that the vehicle's system (battery/charging) voltage is too low for normal operation. The computer constantly monitors charging-system voltage because nearly every sensor, injector, and module depends on a stable supply; sustained low voltage can cause erratic behavior and other false codes. This is most often a charging or battery problem — the alternator isn't keeping up, the battery is weak, or there's resistance in the cables/grounds. You may notice dim lights, slow cranking, or multiple unrelated warning lights. On Hyundai it is documented across 6 models: Ioniq 5, Santa Fe, Veracruz, Entourage, Kona, Palisade.
What are the most common causes of P0562?
The most common causes of P0562 are: Failing alternator or worn alternator brushes/regulator, Weak, old, or discharged battery, Corroded, loose, or damaged battery cables and terminals, Bad engine or chassis ground connections, Slipping, glazed, or broken serpentine/drive belt, High resistance in charging system wiring or fusible link, Faulty PCM voltage reference or charging-system control. The specific cause varies by vehicle.
How much does it cost to fix P0562 on a Hyundai?
Published repair estimates on Hyundai range from $200 to $1,200 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.