Prius battery warning light: Diagnostic Trouble Code P0A80 at 1.2 V gap — block or pack?

A Prius P0A80 code with a ~1.2 V cell-voltage gap usually means one failed NiMH block, not a dead pack. Confirm with rest and load voltage readings. Independent technical note mirroring the canonical version: https://fixmyrideai.com/blog/prius-battery-warning-light-diagnostic-trouble-code-p0a80-at-12-v-gap-block-or-pack.php

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-09
DOI
https://doi.org/10.5281/zenodo.24078323
Primary Topic
Battery Modeling and Management
Type
preprint
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preprint

Prius battery warning light: Diagnostic Trouble Code P0A80 at 1.2 V gap — block or pack?

Noah Hamilton
Zenodo (CERN European Organization for Nuclear Research)
Battery Modeling and Management
preprint

Prius battery warning light: Diagnostic Trouble Code P0A80 at 1.2 V gap — block or pack?

Noah Hamilton
preprint en

Abstract

A Prius P0A80 code with a ~1.2 V cell-voltage gap usually means one failed NiMH block, not a dead pack. Confirm with rest and load voltage readings. Independent technical note mirroring the canonical version: https://fixmyrideai.com/blog/prius-battery-warning-light-diagnostic-trouble-code-p0a80-at-12-v-gap-block-or-pack.php

Zenodo (CERN European Organization for Nuclear Research)
Battery Modeling and Management
DOIOpen Access PDFOpenAlex
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Prius battery warning light: Diagnostic Trouble Code P0A80 at 1.2 V gap — block or pack? — Noah Hamilton · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS