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OBD II Fault Code P1FA3 :

Description of Fault code P1FA3

HUMBP (Humidifier Bypass Valve) Return Spring Damage

Possible failuer P1FA3

  • Increased friction due to a foreign object and/or icing
  • HUMBP failure

Diagnostic Procedure using AutoHex II Scan Tool

  • The rear average wheel speed > 15km/h and vehicle speed on the meter<1km/h
  • If the rear average wheel speed > 15km/h and VSP<1km/h lasts for 0.3 seconds, the malfunction is determined.

Test Conditions using AutoHex tester

  • Vehicle speed / wheel speed is normal
  • Brake is out of action
  • The automatic brake is out of action

Clear Fault codes Conditions

  • The rear average wheel speed > 15km/h and vehicle speed on the meter<1km/h
  • If the rear average wheel speed > 15km/h and VSP<1km/h lasts for 0.3 seconds, the malfunction is determined.

MIL Status

  • Glow ON

BMW Key Programming


Note:

  • AutoHex II is a professional Auto diagnostic.
  • This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
    To get the accurate fault code description you may use AutoHex II

More Fault codes:

OBD II Fault Code P1FA4
OBD II Fault Code P1FA5
OBD II Fault Code P1FA6
OBD II Fault Code P1FA7
OBD II Fault Code P1FA8
OBD II Fault Code P1FA9
OBD II Fault Code P1FAA
OBD II Fault Code P1FAB
OBD II Fault Code P1FAC
OBD II Fault Code P1FAD
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