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!

Body generic / SAE

P25A3

Engine Hood Open

After plausibility checks the body controller has concluded that the engine hood is genuinely open while the vehicle is operating. Used to suspend HV operation on hybrids/EVs (HV interlock), block remote engine start, and trigger the alarm if armed.

SystemBody
Typegeneric / SAE
GroupP2
Range / number5 / A3

Possible causes

  • Hood not properly latched high
  • Failed hood latch sensor medium

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 10–250 €
  • Estimated time: 0.1–1 h
  • Component: hood latch
  • Component: hood switch

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