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

P026E

Charge Air Cooler Coolant Pump A Performance

CAC coolant pump A does not deliver expected flow when commanded.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 6E

Possible causes

  • Pump worn or clogged high

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 120–800 €
  • Estimated time: 1–4 h
  • Component: cac coolant pump a
  • 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