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

P2A76

Alternative Fuel Hydraulic Pump Pressure Sensor Range/Performance

The alternative fuel hydraulic pump pressure signal does not match plausibility checks. Sensor drift or installation offset.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / 76

Possible causes

  • Sensor zero drifted high
  • Sensor mounting loose - bias offset medium
  • Sensor element aged beyond calibration window low

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 200–1000 €
  • Estimated time: 1–4 h
  • Component: alt fuel hyd pump pressure sensor
  • Component: wiring harness
  • Component: afcm
  • MIL / check engine light
  • emissions-relevant
  • 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