P0562 - System Voltage Low

The Technical Definition: The PCM detects that the vehicle's system voltage has dropped below the acceptable threshold, which is typically below 10 to 12.4 volts.

Common Symptoms: The Check Engine or battery light will illuminate, dashboard lights may dim or flicker, electrical accessories may act erratically, and the Jeep may stall or refuse to start.

Typical Fix: On a Jeep Wrangler, this almost always points to a failing alternator or a weak battery. You should clean all corroded battery terminals and fully test the alternator's output before replacing parts.