OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P0A80

Replace Hybrid Battery Pack

The hybrid battery management system has determined that the battery pack must be replaced. Often set after persistent cell imbalance, capacity loss or repeated thermal events.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / 80

Possible causes

  • Battery pack replacement required high
  • Persistent cell imbalance medium

Symptoms

  • EV/hybrid system warning light on
  • Reduced power output or limp mode
  • Charging may fail or be slowed
  • Reduced electric range

Inspection / repair

  • Difficulty: shop only
  • DIY: shop recommended
  • Estimated cost: 2000–12000 €
  • Estimated time: 4–16 h
  • Component: hv battery
  • Component: battery energy control module
  • MIL / check engine light
  • emissions-relevant
  • limp mode possible

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication