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2020 Outback Battery Draining Overnight - Help!

0

Dan C. · rep 0 · May 22, 3:18 AM · 1 replies · solved · Question

My 2020 Subaru Outback Touring has been having a persistent battery drain issue. If I leave it parked for more than 12-18 hours, the battery is completely dead. I've had it jump-started multiple times, and the battery itself tested fine.

The dealership checked it once and said they couldn't find a 'smoking gun,' but it keeps happening. I've unplugged my dashcam and anything else aftermarket, but no change. It's really frustrating to wake up to a dead car.

Is this a common problem with the 2020 Outback? What should I look for or test myself before taking it back to the shop? Any specific modules known to cause parasitic draws?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:18 AM

0

ClearTheCode guidance (Subaru · Electrical & electronics)

Summary: For 2020 Outback Battery Draining Overnight - Help!, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: My 2020 Subaru Outback Touring has been having a persistent battery drain issue. If I leave it parked for more than 12-18 hours, the battery is completely dead. I've had it jump-started multiple times, and the battery itself tested fine.

The dealership checked it once and said they couldn't find a 'smoking gun,' but it keeps happening. I've unplugged my dashcam and anything else aftermarket, but …

This is educational guidance, not a substitute for hands-on diagnosis.

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