Experiencing recurring subaru battery drain issues
Learn the most common symptoms, causes, affected models, and proven solutions to stop your battery from dying unexpectedly.
Learn how to diagnose a parasitic battery drain using a multimeter, fuse testing, and practical steps to isolate the faulty circuit.
Find and fix a parasitic battery drain by testing current draw, pulling fuses, and repairing the faulty circuit before it kills your battery again.
If your vehicle is drawing power from the battery and all of the lights and other electrical components are off, you might have a parasitic battery drain (or draw)
Luckily, you can usually find the cause of a parasitic draw yourself
Start by connecting a digital multimeter to the negative battery terminal of your vehicle.
Need help installing a genuine subaru accessory
Click the “online reference” button above, select “accessory installation instructions” under publication type and search by the accessory part number.
A weak battery or failing alternator causes voltage fluctuations that confuse the tcm, triggering false codes like p0700
Always verify battery and charging system health before replacing.
Subaru has updated diagnostic procedures for dark current and parasitic draw to improve accuracy in identifying causes of dead batteries across all i.c.e