System Voltage Low
The vehicle's computer has detected a voltage drop below normal levels.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The battery voltage is lower than what the system needs to run properly, usually below 9 volts during operation.
What the computer is actually seeing
The engine control unit (ECU) monitors the battery voltage through the power supply circuit. If it sees a voltage drop below around 9 volts, it sets the P0562 code.
What a healthy reading looks like
Normal battery voltage should be 12.6 to 14.4 volts when the engine is running and charging.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check battery voltage with a multimeter: It should read above 12.6 volts with the engine off and 13.5 to 14.4 volts while running. If below 12.6 volts, proceed to next step.
- 2Inspect battery terminals: Ensure they are clean and tight. If corroded, clean and retest. If symptoms persist, check the battery condition.
- 3Examine alternator output: Start the engine and measure voltage at the battery. If less than 13.5 volts, the alternator may be faulty. Test it with a load tester.
- 4Check for damaged wiring: Inspect wires between the alternator and battery for wear or damage. Repair any issues found.
Common causes
- Weak or failing battery
- Alternator not charging properly
- Loose or corroded battery connections
- Faulty wiring or connectors in the charging system
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix this soon; drivability may be affected due to low voltage.
Will this issue come back after repaired?
If the underlying cause is resolved, it shouldn't return.
Why does this code appear with P0563?
P0563 indicates high voltage, while P0562 indicates low voltage, often a sign of an intermittent issue in the charging system.
Working a real vehicle right now?
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