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

P2C72

Hybrid/EV Electronics Cooling System Performance

The hybrid control module detects that the power electronics cooling system does not maintain target temperatures under load. Coolant flow, radiator fouling, or pump output reduced.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberC / 72

Possible causes

  • Radiator fins fouled - reduced heat rejection high
  • Coolant aged - reduced heat capacity medium

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 200–1500 €
  • Estimated time: 1–6 h
  • Component: hybrid electronics coolant pump a
  • Component: hybrid electronics radiator
  • Component: power electronics coolant loop
  • MIL / check engine light
  • 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