P0562 Code: System Voltage Low
P0562 means the electrical system voltage is lower than the ECM expects — a charging or battery problem.
- Applies to
- All OBD-II vehicles (any make or model)
- Est. repair cost
- $30 – $400
- Time to fix
- 1-3 hours
What it means
Common causes are a failing alternator, a weak battery, loose/corroded battery or ground connections, or a bad belt. This is a generic OBD-II powertrain code defined in the SAE J2012 standard, so it applies to virtually any 1996-or-newer OBD-II vehicle — cars, trucks, and modern fuel-injected motorcycles — from any manufacturer (Toyota, Honda, Ford and the rest). Read it with any OBD-II scanner; the meaning is the same across brands, though the exact repair can vary by engine.
Symptoms
- Check engine light on; possible dim lights
- Battery/charging warning
- Rough running or stalling
How to fix it
- 1
Test the battery and charging
1. Test battery voltage and load. 2. Measure charging voltage (should be ~13.5–14.5V running). 3. Clean connections; replace a weak battery or failing alternator. Clear the code.
Frequently asked questions
Can a bad alternator cause P0562?
Yes — a failing alternator (or weak battery/loose connections) lets system voltage drop. Test charging output first.
Last updated July 16, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.