P0562 on Volvo: How to Diagnose & Fix
System Voltage Low
2 Volvo models · 2 documented issues · 1 critical · $250-$1,500 repair
P0562 on Volvo by model: symptoms, diagnosis and fix
A recurring owner complaint on newer XC90s is unexpected 12V battery discharge leading to '12V battery critical charging fault,' no-start conditions, warning lights, and multiple electronic features going offline. The issue can be intermittent and is often tied to software sleep-state problems, telematics modules staying awake, or a weak auxiliary battery. Because the XC90 relies heavily on networked modules, low system voltage can create a cascade of unrelated warnings that disappear after charging or battery replacement.
Common Symptoms
- 12V battery warning messages
- No-start or hard start
- Multiple warning lights at once
- Remote functions stop working
- Vehicle acts normal after jump-start or charging
- Intermittent electrical glitches
How to Fix
Load-test the 12V battery, check charging voltage, and inspect for excessive parasitic draw after the vehicle enters sleep mode. Update vehicle software and inspect telematics/infotainment modules if the draw remains high. Replace a weak AGM battery and clear low-voltage faults; if the drain persists, dealers may need to trace module wake-up activity on the CAN network.
T8 plug-in hybrid V60s repeatedly suffer a discharged 12V starter battery, leaving the car dead and unable to start even when the high-voltage drive battery is full of charge. The 12V is supposed to be topped up by a DC-DC inverter fed from the 300V pack, but the inverter sometimes fails to charge it, and parasitic draw from modules that do not fully sleep drains it. Owners report flat 12V batteries after the car sits as little as one to two weeks, and some chase repeat failures for over a year on nearly new cars.
Common Symptoms
- Dead 12V battery and no-start despite full hybrid charge
- Car will not wake or unlock electronically
- Repeated flat battery after sitting days to weeks
- Battery warning / electrical fault messages
- Needs frequent jump-starts
How to Fix
Jump or charge the 12V battery, then run the car in ready-to-drive mode 30-60 minutes with lights and climate off to let the hybrid system recharge it. Have the dealer check for current software (updates improve the inverter charging logic and module sleep behavior) and perform a parasitic-draw test. A weak or aged AGM 12V battery should be replaced with the correct AGM unit and registered to the battery monitoring system. If the car sits for extended periods, use a maintainer on the 12V battery.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Bosch S6587B H7 AGM 80Ah 800CCA main 12V battery
replace a failed main H7 AGM battery after charging-system and parasitic-draw diagnosis Fitment/availability: Volvo V60 T8 Recharge whose installed main 12V battery label and VIN specification call for H7/LN4/Group 94R AGM, 80Ah and 800C…
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Sources for this issue (2)
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 Volvo?
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 Volvo it is documented across 2 models: XC90, V60.
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 Volvo?
Published repair estimates on Volvo range from $250 to $1,500 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.
Looking for P0562 on a different make?
View P0562 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.