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

P2560

Engine Coolant Level Low

The coolant level monitor reports the engine coolant below the safe minimum after sensor checks pass. Continued operation risks overheating, head warping and head-gasket failure. The driver is warned and the ECM may reduce engine power until the level is restored.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 60

Possible causes

  • External coolant leak (hose, radiator, water pump) high
  • Missed top-up since last service medium
  • Head gasket leaking coolant into combustion low

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 20–1500 €
  • Estimated time: 0.2–6 h
  • Component: cooling system
  • Component: coolant
  • 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