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

P2D11

Exhaust Flow Control Valve A Position Not Learned

The ECM has not learned the end-stop calibration for exhaust flow control valve A. Position cannot be commanded with full precision until adaptation completes.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberD / 11

Possible causes

  • Adaptation lost after battery disconnect or ECM reset high
  • Valve replaced without learn procedure medium

Inspection / repair

  • Difficulty: easy
  • DIY: shop recommended
  • Estimated cost: 50–250 €
  • Estimated time: 0.3–1.5 h
  • Component: exhaust flow control valve a
  • Component: ecm
  • MIL / check engine light
  • emissions-relevant
  • drive cycle required

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