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P0562 Severity
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
The Charging System maintains an ideal vehicle voltage level when the engine is running. If the battery voltage drops below 10 volts, the engine control module (PCM) will set code P0562.
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OBD-II Code P0562 is defined as a System Voltage Low
The purpose of the Charging System is to maintain an ideal vehicle voltage level, which is usually 14.1 - 14.4 volts DC when the vehicle is idling with the lights off. When the code P0562 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is seeing a lower than requested vehicle voltage. The code will set when the voltage level goes below 10.0 volts for more than 60 seconds while the engine is running.
When diagnosing a P0562 code, it is important to record any other codes and the P0562 freeze frame data. Then one should duplicate the code setting conditions with a test drive. Be sure to check voltage output from the Alternator B+ terminal and check the voltage drops from the Battery power and ground terminals for the charging system. I also like to pay close attention to the scan tool data, especially the charging system requested voltage vs the actual vehicle system voltage. I observe this while I change engine load, throttle position, RPM, and road speed because at times, P0562 can be difficult to detect.