P0562 on Volvo: How to Diagnose & Fix
System Voltage Low
1 Volvo model · 1 documented issue · $250-$1,200 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.
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 1 model: XC90.
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 $1,200 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.
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.