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

P2465

Diesel Particulate Filter Differential Pressure Sensor Range/Performance

The DPF differential pressure sensor signal is implausible compared to engine load and exhaust flow. Either the sensor or the pressure tubes leading to it are at fault.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 65

Possible causes

  • Soot/water clogged pressure tubes high
  • Sensor drift medium
  • Sensor element aged beyond calibration window low

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: 120–500 €
  • Estimated time: 0.5–2 h
  • Component: dpf diff pressure sensor
  • Component: dpf pressure lines
  • 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