Back-Up Voltage Circuit Malfunction
2023-2024 Subaru Solterra Electric
Description
The PCM has detected a malfunction in the back-up voltage circuit. This circuit provides battery voltage to the PCM memory to preserve adaptive learning values and stored data when the ignition is off.
Symptoms
- Check Engine Light
- Loss of PCM adaptive memory on each key-off
- Slightly rough idle after restart
- Fuel trim relearning each drive cycle
Common Causes
- Blown back-up power fuse
- Corroded battery cable or terminal
- Wiring open in back-up voltage circuit
- Faulty back-up power relay
- Battery in poor condition
Diagnostic Steps
- Check back-up voltage fuse
- Measure back-up circuit voltage at PCM connector with key off
- Inspect battery terminals for corrosion
- Test back-up power relay
- Check wiring continuity
Repair Notes
Replace the blown fuse or repair wiring in the PCM back-up voltage circuit.
Related Codes
Other Powertrain Codes
- P0070Ambient Air Temperature Sensor Circuit
- P0071Ambient Air Temperature Sensor Range/Performance
- P0072Ambient Air Temperature Sensor Circuit Low
- P0073Ambient Air Temperature Sensor Circuit High
- P0115Engine Coolant Temperature (ECT) Sensor 1 Circuit
- P0116ECT Sensor 1 Circuit Range/Performance
- P0117ECT Sensor 1 Circuit Low Input
- P0118ECT Sensor 1 Circuit High Input
- P0119ECT Sensor 1 Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
P1560 on Other Vehicles
Common Questions
What does code P1560 mean on a 2023-2024 Subaru Solterra?
P1560 stands for "Back-Up Voltage Circuit Malfunction". The PCM has detected a malfunction in the back-up voltage circuit. This circuit provides battery voltage to the PCM memory to preserve adaptive learning values and stored data when the ignition is off.
What are the symptoms of P1560 on a Subaru Solterra?
Common symptoms of P1560 include: Check Engine Light, Loss of PCM adaptive memory on each key-off, Slightly rough idle after restart, Fuel trim relearning each drive cycle.
What causes P1560 on a 2023-2024 Subaru Solterra?
Common causes of P1560 include: Blown back-up power fuse, Corroded battery cable or terminal, Wiring open in back-up voltage circuit, Faulty back-up power relay, Battery in poor condition.