P0562 on Genesis: How to Diagnose & Fix
System Voltage Low
1 Genesis model · 1 documented issue · $200-$600 repair
P0562 on Genesis by model: symptoms, diagnosis and fix
G70 owners report the 12V battery going dead, sometimes overnight or after the car sits a few days, leaving the vehicle unable to start. Beyond normal battery aging, a recurring cause is parasitic draw — modules not fully going to sleep. The head unit/infotainment has been identified by owners as continuing to draw power with the car off, and other always-on modules can keep the draw above the normal sub-25 mA sleep target. The result is repeated no-starts even on cars with a healthy battery.
Common Symptoms
- Dead battery / no-crank after the car sits overnight or a few days
- Slow engine crank, dim lights, clicking when starting
- Battery repeatedly dies even after replacement
- Electronics behaving oddly before a no-start
How to Fix
Load-test the battery and check charging-system output first; replace the AGM battery if it fails. If the battery is good, measure parasitic draw with a multimeter after the modules sleep (target under ~25-50 mA) and pull fuses to isolate the offending circuit — the head unit/infotainment is a common culprit. Apply any infotainment/BMS software updates, and have the dealer check for related service campaigns. A battery maintainer helps cars that sit for long periods.
What you need to diagnose it
The fix here starts with a test, not a part — which repair you need depends on what the test finds.At least one code uses a manufacturer-specific format. No scanner recommendation is shown because family-level coverage cannot prove it can read that code.
UNI-T UT210E Low-Current DC Clamp Meter
1 mA resolution on the 2 A range — a 0.1 A meter reads a 50 mA drain as zero
$40–$70View
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Testing and isolating the fault is DIY work. Replacing or reprogramming a control module is not — most are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.
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 (1)
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 Genesis?
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 Genesis it is documented across 1 model: G70.
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 Genesis?
Published repair estimates on Genesis range from $200 to $600 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.