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Hybrid System Warning Light on my 2017 Prius Prime - P0A80 code

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Diana O. · rep 0 · May 22, 2:21 AM · 1 replies · solved · Question

Hey everyone, I'm getting a 'Check Hybrid System' warning light on my dashboard. It's a 2017 Toyota Prius Prime Advanced, and I've noticed my MPG has dropped significantly lately. The car feels a bit sluggish too.

I took it to a local auto parts store to get the codes read, and it came up with P0A80. I'm really hoping it's not the hybrid battery, as I know those can be expensive. Has anyone else experienced this with their Prius Prime or other Toyota hybrid around this model year?

What should I be looking for, or are there any common TSBs related to this? I'm trying to figure out if this is something I can troubleshoot myself or if it's definitely a dealer visit.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 2:21 AM

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ClearTheCode guidance (Toyota · Buying & ownership)

Summary: For Hybrid System Warning Light on my 2017 Prius Prime - P0A80 code, 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: Hey everyone, I'm getting a 'Check Hybrid System' warning light on my dashboard. It's a 2017 Toyota Prius Prime Advanced, and I've noticed my MPG has dropped significantly lately. The car feels a bit sluggish too.

I took it to a local auto parts store to get the codes read, and it came up with P0A80. I'm really hoping it's not the hybrid battery, as I know those can be expensive. Has anyone else …

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

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