P0562 - System Voltage Low

P0562 means system voltage dropped below the expected range. The most common causes are a weak battery, low alternator output, or excessive resistance at the battery, ground, or charging connections.

Code Overview

P0562 means system voltage dropped below the expected range. The most common causes are a weak battery, low alternator output, or excessive resistance at the battery, ground, or charging connections.

Common Causes

• Weak battery
• Low alternator output or charging system fault
• Loose, dirty, or corroded battery terminals or grounds

Symptoms

• Slow cranking or intermittent no-start
• Dim lights or unstable electrical accessories
• Multiple low-voltage communication or module codes

Diagnostic Steps

1. Check resting battery voltage and perform a battery load or conductance test
2. Measure charging voltage with the engine running and electrical load applied
3. Inspect battery terminals, main grounds, and charging-cable connections for voltage drop
4. Check for a belt or alternator-drive issue if charging output is low

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.