P0562: System Voltage Low
P0562 means System Voltage Low. The engine computer sees system voltage below its expected minimum, usually a charging system or battery problem.
Have the battery and alternator tested together: a weak battery can make a healthy alternator look bad and the reverse.
Can I keep driving? Limit driving and diagnose promptly. Continued driving can cause damage, stalling or limp mode.
Common symptoms
- Battery or check engine light on
- Dim or flickering lights
- Electrical systems acting up
- Hard starting or stalling
Possible causes
- Weak or failing alternator / voltage regulator
- Weak or old battery
- Loose or corroded battery terminals
- Poor engine or chassis ground
- Slipping or worn drive belt
How to diagnose P0562
- Measure battery voltage engine off (about 12.6 V when fully charged) and running (typically about 13.5–14.7 V).
- Clean and tighten battery terminals and grounds.
- Load-test the battery.
- Test alternator output and check the drive belt.
What the code means, digit by digit
Generic codes have the same definition on every OBD-II vehicle (petrol cars from model year 1996 in the US, 2001 in the EU; diesels later). Manufacturers can add their own enhanced codes; those are not listed here.
Symptoms linked to P0562
Related codes
General guidance only. Fault codes describe what the engine computer saw, not which part failed: confirm with testing before replacing parts, and follow the vehicle's service information.