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

B0175

HVAC Recirculation Door Performance

The HVAC control module has detected that the recirculation door does not reach the commanded position within the expected time. The recirc door switches between fresh air and recirculated cabin air.

SystemBody
Typegeneric / SAE
GroupB0
Range / number1 / 75

Possible causes

  • Recirculation door actuator failed high
  • Recirculation door mechanically binding medium

Symptoms

  • Warning light or symbol related to the affected system
  • Comfort or safety function impaired

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 80–500 €
  • Estimated time: 0.5–3 h
  • Component: recirculation door actuator
  • Component: hvac control module

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