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

P0AB9

Hybrid/EV System Performance

The hybrid control module detects that the overall hybrid system performance does not match the calibrated profile. Multi-component analysis required.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / B9

Possible causes

  • System component drift high
  • System calibration off medium

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 500–5000 €
  • Estimated time: 3–16 h
  • Component: hybrid control module
  • Component: bms
  • Component: drive motor a
  • Component: generator
  • MIL / check engine light
  • drive cycle required
  • 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