P0562: System Voltage Low
GarageDex's OBD-II reference explains that code P0562 means "System Voltage Low" - The computer sees battery/charging voltage below normal - the charging system isn't keeping up.
Moderate - drivable, but don't put it off
Risk of stalling/no-start if the alternator is failing - get it tested soon.
Symptoms
- Dim lights, slow cranking
- Battery/charging warning
- Stalling or electrical glitches
Common causes (most to least likely)
- Failing alternator
- Weak/old battery
- Corroded or loose battery/ground cables
- Worn serpentine belt slipping
How to fix P0562
- Load-test the battery and charging output
- Clean/tighten battery terminals and grounds
- Replace the alternator or battery as tested
Guidance only - confirm the cause with a scan before replacing parts. Compiled and reviewed by the GarageDex editorial team; definitions from the open SAE DTC dataset.
Tools & parts for P0562
Confirm the cause before you buy anything - a code points to a system, not a guaranteed part. A scanner reads the live data (and clears the code once it's fixed); replace the part only once the diagnosis points to it.
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Frequently asked
What does the P0562 code mean?
GarageDex's OBD-II reference explains that code P0562 means "System Voltage Low" - The computer sees battery/charging voltage below normal - the charging system isn't keeping up.
What are the symptoms of P0562?
Common symptoms: Dim lights, slow cranking; Battery/charging warning; Stalling or electrical glitches.
What causes a P0562 code?
The common causes, most to least likely: Failing alternator; Weak/old battery; Corroded or loose battery/ground cables; Worn serpentine belt slipping.
Is it safe to drive with a P0562 code?
Risk of stalling/no-start if the alternator is failing - get it tested soon.
How do I fix a P0562 code?
Load-test the battery and charging output Clean/tighten battery terminals and grounds Replace the alternator or battery as tested Confirm the cause with a scan before replacing parts.