EV and hybrid code
P0A80: Hybrid battery weak or worn out
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $1,200 | $4,500 |
| Labor: 2 to 6 hours × $125 to $175 an hour | $250 | $1,050 |
| Fees: shop supplies, disposal, diagnostics | $0 | $100 |
| Total, rounded | $1,450 | $5,700 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in Boston, $31.54 an hour, times 4 to 5.5 to cover what a shop bills (overhead, tools, insurance, profit). Parts are a band from budget aftermarket to the manufacturer part. Full method.
Not a repair shop, estimates only. Typical range, estimate. Not a quote. Your car, parts and shop change the number.
This is the range for the most common fix, hybrid battery replacement. Which repair your car needs depends on a proper diagnosis.
On many Toyota and Honda hybrids, this code means the high-voltage battery has weakened and some of its cells are out of balance with the others. The car relies on the engine more to make up for it. It is a common age-related code, though the exact meaning can vary by make.
- Safe to drive?
- Short trips only
- Most common cause
- Aging battery cells
The car may still drive on gas, but power and mileage drop. Stop driving if the car goes into limp mode, shows a red warning, loses power, or you smell something burning. Call a tow rather than keep driving.
What you may notice
- Hybrid or master warning light on
- Poor gas mileage
- Engine runs more than usual
- Battery gauge jumping around
Common causes, most likely first
- Aging battery cells
- One weak battery module
- Dirty battery cooling fan or vents
- Cooling fan failure
- Imbalance after long storage
Check this first
Clean the battery cooling vent and air intake (often under the rear seat) and listen for the fan. Heat shortens battery life.
Other repairs that sometimes fix P0A80
| Repair | Typical range, Boston |
|---|---|
| High-voltage battery inspection and service | $120 to $880 |
| EV battery coolant service / pump | $190 to $1,300 |
| Diagnostic scan (check engine light) | $60 to $290 |
Before you pay
- Ask the shop what test showed this part is the cause, not just that the code appeared.
- Ask for parts and labor listed separately, and for the hours.
- Ask for a written OK before any extra work. Massachusetts rules require written authorization before repairs.
Got a quote already? Check it against the range. Want to see if your car has a recall tied to this problem? Check recalls by VIN.
Need to read a code yourself? OBD-II scanners on eBay (affiliate link, disclosure).
P0A80 questions
Do I need a whole new pack?
Not always. Some shops replace only the weak modules or recondition the pack, which can cost less than a new one. Ask what the test showed about the cells before agreeing to a full pack.
How long do hybrid batteries last?
Often ten years or more, depending on heat and how the car is used. Cars in hot places or that sit for long periods tend to wear out the pack sooner.
Is a warranty available?
Many makes cover the hybrid battery for a long period, sometimes 8 years or more. Check your paperwork or ask a dealer for the exact terms, since coverage can depend on the state.
How much does it cost to fix P0A80?
The most common fix, hybrid battery replacement, has a typical range of $1,450 to $5,700 in Boston. It is an estimate built from parts prices and local labor wages, not a quote. Your car and shop change it.
Related codes
- P0A7F: Hybrid battery pack deterioration
- P0AFA: Hybrid battery voltage low
- P0A93: Inverter cooling system problem
More ev and hybrid codes
Code meaning written in our own words. Some codes mean different things on different makes, so check your scan tool or manual. Not a repair shop, estimates only.