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

P03EA

A Camshaft Profile Actuator Position Sensor B Exceeded Learning Limit

The adaptive learning offset for camshaft profile actuator A position sensor B has reached its learning limit. Long-term mechanical wear of the cam profile lock pin or oil control valve.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / EA

Possible causes

  • Long-term wear high

Symptoms

  • Check engine light on
  • Power loss especially in mid-rpm range
  • Possible rough idle or stalling
  • Increased fuel consumption

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 200–2000 €
  • Estimated time: 1.5–6 h
  • Component: camshaft position actuator
  • MIL / check engine light
  • emissions-relevant

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