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OBD II Fault Code P1FA1 :

Description of Fault code P1FA1

HUMBP (Humidifier Bypass Valve) Driver IC Error

Possible failuer P1FA1

  • M1 short-circuit fault
  • M2 short-circuit fault
  • IGM open-circuit fault
  • HUMBP failure
  • FCCM 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

Changing Dmaged DME in F Series


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 P1FA2
OBD II Fault Code P1FA3
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
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