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

P0A1D

Hybrid/EV Powertrain Control Module A

The hybrid/ev powertrain control module a reports a generic fault. Internal self-tests fail or response time outside calibration.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / 1D

Possible causes

  • Internal module fault high
  • Communication degraded medium

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 500–3500 €
  • Estimated time: 3–12 h
  • Component: hybrid powertrain cm a
  • MIL / check engine light
  • limp mode possible

Sources

References

sae:J2012

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