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

P243E

Particulate Filter Regeneration Incomplete Bank 2

A regeneration cycle on bank 2 was started but did not bring the DPF backpressure down sufficiently - either the cycle was interrupted (driver stopped before completion) or thermal conditions were not met.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 3E

Possible causes

  • Regeneration aborted before completion high

Symptoms

  • Check engine light or DPF warning light on
  • Power loss / limp mode
  • Increased fuel consumption
  • Failed forced regeneration attempts

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 50–500 €
  • Estimated time: 0.5–2 h
  • Component: dpf b2
  • 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