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

P26EA

Fuel Pump Control Module B

A general fault in the second fuel pump control module (smart pump controller, separate from the ECU). Internal self-test failed or communication with the ECU is degraded.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / EA

Possible causes

  • Internal fault in the pump module high
  • Bus communication errors with ECU medium

Symptoms

  • Check engine light on
  • Hard start, no start, or stalling under load
  • Power loss especially at high load or rpm
  • Possible long cranking time

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 200–1500 €
  • Estimated time: 1–4 h
  • Component: fuel pump module b
  • Component: communication bus
  • 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