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

P2AAD

Diesel Fuel Presence Sensor Range/Performance

The diesel fuel presence signal does not match plausibility checks against related signals. Sensor drift.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / AD

Possible causes

  • Sensor characteristic drifted high
  • Sensor mounting displaced from reference path medium
  • Sensor element aged beyond calibration window low

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 60–300 €
  • Estimated time: 0.3–1.5 h
  • Component: diesel fuel presence sensor
  • Component: wiring harness
  • Component: ecm
  • 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