Applicable Systems
OBD-II

Symptoms

System voltage below 10V for extended period; battery not charging; possible alternator failure.

Possible Causes

  • Alternator not charging
  • Alternator drive belt broken/loose
  • Battery faulty/shorted cell
  • Excessive electrical load

Troubleshooting Steps

  1. Step 1: Check battery voltage engine OFF
    Voltage >= 12.6V
  2. Step 2: Start engine and check charging voltage
    Voltage 13.8-14.4V at idle
  3. Step 3: Inspect alternator belt
    Belt tensioned and intact
  4. Step 4: Test alternator output current
    Output meets spec (60-120A)
  5. Step 5: Replace alternator or battery as needed
    Voltage stable 13.8-14.4V

How to Reset

Clear with OBD-II scanner after charging system repair.

Common Replacement Parts

  • Alternator (OEM spec)
  • Drive Belt

Frequently Asked Questions

  • Q: Can shorted battery cell cause P0562?

    Yes. A battery with a shorted cell (10.5V instead of 12.6V) will cause alternator to work harder and may trigger P0562. Load test battery before alternator replacement.

Related OBD-II Generic (SAE J2012) Fault Codes

Source: SAE J2012 standard DTC list + OBD-II portal

Category: OBD-II