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Generic gasoline powertrain DTC / Power supply and charging

P0562: System voltage low

The controller detected system voltage below its expected range under the monitor conditions.

Generic definition
P0563

Likely cause paths · unconfirmed

A possible low-voltage battery or connection issue

A discharged or weak 12-volt supply or a poor connection may lower system voltage; the code does not identify the source.

  • Note slow cranking, recent storage, or whether the warning appears during starting.
  • Do not attempt a jump-start without the exact owner-manual procedure.

A possible charging-system or wiring issue

Charging output, belt drive, wiring, or a connection may contribute; verify the system before replacing a component.

  • Record whether a charging warning remains on while running.
  • Keep clear of belts and electrical terminals.

Likely causes and repair directions are general, conditional orientation. The SAE citation supports the generic DTC definition only; it does not validate these causes, tests, repairs, or fitment to a particular vehicle.

Conditional likely repairs

A code describes a monitored condition; it does not prove a failed part. Use these directions only after confirming the cause.

If confirmed: A possible low-voltage battery or connection issue

If battery and connection testing confirms a low-voltage supply fault, repair or charge the verified cause using the vehicle-approved method.

Evidence to confirm

  • A battery and connection test identifies the fault.
  • The vehicle starts and system voltage meets OEM requirements after service.

If confirmed: A possible charging-system or wiring issue

If charging and wiring tests confirm a fault, repair the isolated charging or wiring cause; do not replace an alternator from the code alone.

Evidence to confirm

  • Charging output and circuit tests isolate the fault.
  • The warning and code do not return under the prescribed verification.

Guided evidence checks

  1. 01

    Record what happened

    Note when the warning appeared, what the vehicle was doing, and any recent service or change. Do not deliberately recreate an unsafe symptom.

  2. 02

    Make only a safe visual check

    Note battery/charging warnings and starting behavior. Do not touch battery terminals, moving belts, or high-voltage hybrid components.

  3. 03

    Preserve scan-tool evidence

    Qualified technician

    Save all current/pending codes, freeze-frame, and available system-voltage data as displayed.

  4. 04

    Confirm the system path

    Qualified technician

    A qualified technician should test the low-voltage battery, connections, charging output, and wiring with vehicle-specific specifications.

Code-specific symptom note

  • Code-specific symptoms are not verified by the cited definition. Record the driver’s actual observations separately.

This generic code reference is not an OEM procedure, does not confirm that a DTC applies to a particular make/model/engine, and is not a repair diagnosis. Follow vehicle-specific service information or consult a qualified technician.