P0562 means the engine control unit has detected that the system voltage has dropped below the normal operating range, typically below 11.5 volts while the engine is running. This usually points to a failing alternator, a worn serpentine belt, corroded battery terminals, or an aging battery.
P0562 means the engine control unit has detected that the system voltage has dropped below the normal operating range, typically below 11.5 volts while the engine is running. This usually points to a failing alternator, a worn serpentine belt, corroded battery terminals, or an aging battery.
P0562 is a electrical-related diagnostic trouble code classified as moderate severity. When your vehicle's ECU detects this condition, it stores P0562 and illuminates the check engine light.
If your vehicle has triggered P0562, you may notice one or more of these symptoms:
Here are the most common causes of P0562, ranked by how likely they are to be the culprit:
No - address this immediately. Low system voltage can cause the engine to stall, disable safety systems like power steering and ABS, and leave you stranded. If the battery light is on, drive directly to a repair facility or pull over safely.
Follow these steps to pinpoint the root cause of P0562:
Repair costs for P0562 vary depending on the root cause and your vehicle. Here are typical estimates:
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
P0562 behaves differently depending on your vehicle. Select your car below for model-specific causes, known issues, and adjusted cost estimates:
These codes are often seen alongside P0562 or indicate related issues:
The most common cause is a failing alternator that can no longer maintain proper charging voltage. A worn serpentine belt, corroded battery terminals, or a weak battery are also frequent causes. The ECU sets P0562 when it detects voltage below approximately 11.5V.
Yes. A battery with a dead cell or severe internal degradation can drag system voltage down even while the alternator is working. If the battery is more than 4-5 years old and P0562 appears, have the battery load-tested as a first step.
It is not advisable. Low system voltage can cause the engine to stall, disable electronic power steering, and shut down safety systems. If the battery light is on, the alternator may have failed and the vehicle is running on battery alone, which will die within minutes to hours.
With the engine running, measure voltage at the battery terminals with a multimeter. It should read 13.5 to 14.8V. Then turn on headlights, A/C, and rear defroster. If voltage drops below 13V under load, the alternator is weak or failing.
Yes. Heavy corrosion on the battery terminals creates resistance that prevents full current flow. The voltage at the ECU drops even if the alternator output is fine. Cleaning the terminals with a wire brush and applying dielectric grease is a quick, inexpensive fix.
A grinding noise when driving usually means brakes, a wheel bearing, a CV joint or a belt pulley. Match when it grinds to the part, and to the repair cost.
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