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

P02BB

Cylinder 9 - Fuel Trim at Min Limit

Per-cylinder fuel trim on cylinder 9 has reached its minimum correction limit. Cylinder running too rich structurally.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / BB

Possible causes

  • Cylinder 9 running structurally rich high

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 200–2500 €
  • Estimated time: 1–6 h
  • Component: fuel injector
  • 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