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

P2A0F

Fuel Supply Heater Performance

The fuel supply heater does not raise fuel temperature within the calibrated time window. Common in diesel and biofuel installations to prevent paraffin or fat crystallisation in cold weather.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / 0F

Possible causes

  • Heater element aged - low output high
  • Supply voltage low under load medium

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 80–400 €
  • Estimated time: 0.5–2 h
  • Component: fuel supply heater
  • Component: fuel temperature sensor
  • MIL / check engine light

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