What does code P0562 mean on a Subaru and is it safe to drive?
P0562: System Voltage Low. Here's what it means on your Subaru, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
What this code means
The PCM has detected that system voltage is below the acceptable threshold. Usually points to a failing battery, alternator, or a poor ground connection.
Common causes for your Subaru
- Weak or failing battery
- Failing alternator not producing sufficient output
- Poor battery cable or ground connections
- Parasitic draw draining the battery
Symptoms
- Check Engine Light
- Dim headlights
- Electrical accessories acting erratically
- Hard starting or slow cranking
Typical fixes
- Load-test battery and replace if weak
- Test alternator output and replace if low
- Clean battery terminals and ground connections
Repair cost range
For a Subaru, repairs for P0562 often fall between $100 and $500, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Subaru
Subaru P0562 on EJ-engine models is commonly a failing alternator diode or weak battery. These alternators see high current demand from the AWD system and degrade faster than on 2WD vehicles. Test alternator ripple voltage—a failing diode causes AC ripple that can damage the ECU.
Most commonly affected models