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

P0B22

Generator Phase U Current Sensor Circuit

Electrical fault on the phase U current sensor of the generator/MG2 used in series-parallel hybrid systems.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberB / 22

Possible causes

  • Current sensor failed high

Inspection / repair

  • Difficulty: shop only
  • DIY: shop recommended
  • Estimated cost: 800–4500 €
  • Estimated time: 3–12 h
  • Component: generator
  • Component: phase current sensor
  • Component: inverter
  • MIL / check engine light
  • 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