System voltage low
What P0562 means
Your car's computer set P0562: System voltage low. It belongs to the speed, idle and auxiliary inputs group of codes. It is a generic code, so it means the same thing on every make. The check engine light usually comes on once the fault has been seen on two drives in a row. Until then it shows up as a pending code.
Can I keep driving? A weak charging system can leave you stranded. Test the battery and alternator soon.
Common causes
- Weak or old battery
- Failing alternator
- Loose or corroded battery terminals
Fix the cheapest, most likely cause first. Clearing the code without a repair only turns the light off until the fault comes back.
Check it yourself
Run the Battery & charging test in Mods. Running voltage should be about 13.7–14.7 V.
Torque Deck reads P0562 with a cheap Bluetooth OBD2 adapter. It also shows the freeze frame (engine conditions at the moment the code set) and the live data you need to narrow it down.
Parts
Parts most often replaced for P0562: battery. Confirm the cause first, and match the part to your exact engine.
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Related codes
This page explains what the code usually means. It is not a diagnosis of your car. When in doubt, ask a mechanic.