P0A80: Replace Hybrid Battery Pack
The hybrid computer sees a big difference between battery blocks, meaning the high-voltage battery is wearing out.
Green, yellow, red: three ways P0A80 can look
The same code can be a quick fix or a reason to pull over. Match your situation to the closest example.
Keep an eye on it
Light on, mileage barely changed, car drives normally. Plan ahead; it can run for a while.
Schedule a repair
Fuel economy dropping or power loss. Get the battery tested and the cooling fan cleaned.
Stop and get help
Red warning triangle, reduced power, or the car won't go into Ready. Stop driving; it can leave you stranded.
Symptoms you might notice
- Lower fuel economy
- Engine runs more often
- Battery gauge swinging quickly
Common causes, cheapest first
- Aging hybrid battery modules
- Clogged hybrid battery cooling fan or filter (common)
- Corroded battery bus bars
What you can check before calling
- Check the hybrid battery cooling vent (often near the rear seat) for dust or pet hair
A code points to a system, not a part. Replacing parts based on the code alone is how people spend money without fixing the problem. Testing confirms the cause first.
Want the full story? Read our guide: Signs your hybrid battery is failing.
Generic codes (second character 0) mean the same thing on every vehicle. Some manufacturers add their own details, so check service information for your exact vehicle.
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does P0A80 mean?
P0A80 means "Replace Hybrid Battery Pack". The hybrid computer sees a big difference between battery blocks, meaning the high-voltage battery is wearing out.
Can I drive with code P0A80?
It depends on what the vehicle is doing. Green: Light on, mileage barely changed, car drives normally. Plan ahead; it can run for a while. Yellow: Fuel economy dropping or power loss. Get the battery tested and the cooling fan cleaned. Red: Red warning triangle, reduced power, or the car won't go into Ready. Stop driving; it can leave you stranded.
What causes P0A80?
The most common causes are: aging hybrid battery modules; clogged hybrid battery cooling fan or filter (common); corroded battery bus bars.
Is P0A80 a serious code?
It can be. Red warning triangle, reduced power, or the car won't go into Ready. Stop driving; it can leave you stranded.
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