OBD-II Code
P0A80
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$1,100–$4,800
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P0A80 is the BECM's explicit verdict that the hybrid battery pack has exceeded its end-of-life criteria and must be replaced — it is set after persistent P0A7F deterioration conditions, block voltage delta exceeding 1.2V on Toyota HSD, or repeated state-of-charge calculation failures across multiple drive cycles.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP0A80 is the BECM's explicit verdict that the hybrid battery pack has exceeded its end-of-life criteria and must be replaced — it is set after persis…
P0A80 is the BECM's explicit verdict that the hybrid battery pack has exceeded its end-of-life criteria and must be replaced — it is set after persistent P0A7F deterioration conditions, block voltage delta exceeding 1.2V on Toyota HSD, or repeated state-of-charge calculation failures across multiple drive cycles.
Cheapest-first diagnostic ladder
- confirm the code is not stale from a prior pack swap or BECM reset by clearing and driving two full warm-up cycles with mixed city/highway — a freshly rebuilt pack should not re-set P0A80 within 50 miles unless a module is already failing.
- Pull block voltages with Techstream/FORScan/HDS and document the spread; a pack throwing P0A80 will typically show 0.5V or greater delta between strongest and weakest block at rest, and 1.0V or greater under load.
- Caveat: P0A80 is a hard-set code on most platforms and will not self-clear even after module replacement until the BECM completes its internal recalibration cycle.
Vehicle-specific patterns2004-2009 Toyota Prius Gen 2 (NHW20) — the iconic P0A80 case, typically at 180K-220K miles; options are OEM new ($2400+), Toyota reman ($1800), indep…
- 2004-2009Toyota Prius Gen 2 (NHW20) — the iconic P0A80 case, typically at 180K-220K miles; options are OEM new ($2400+), Toyota reman ($1800), independent refurb with grid-charged modules ($1100), or full lithium conversion ($2200-3000).
- 2010-2015Toyota Prius Gen 3 — same code but pack uses 28 modules in 14 blocks with revised cooling.
- 2007-2011Toyota Camry Hybrid — 34-module NiMH pack under rear seat, P0A80 onset around 160K with the trunk-mounted blower drawing dust.
- 2005-2012Ford Escape Hybrid — 250V NiMH pack, P0A80 typically forces dealer-only replacement due to BECM marriage.
Estimated repair$1,100 to $4,800.
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