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OBD II Fault Code P1F91 :

Description of Fault code P1F91

Hydrogen Leak Detection

Possible failuer P1F91

  • Hydrogen leak from Tank Unit
  • Hydrogen leak from Fuel Pressure Regulator P1
  • Hydrogen leak from Relief Unit
  • Hydrogen leak from Regulator ASSY
  • Hydrogen leak from Fuel Warmer
  • Hydrogen leak from Fuel Circulation Pump
  • Hydrogen leak from FCSIFP Sensor
  • Hydrogen leak from Fuel Cell Stack
  • Hydrogen leak from Demister
  • Hydrogen leak from FCSIFT
  • Hydrogen leak from Drain Valve
  • Hydrogen leak from Fuel Purge Solenoid Valve
  • Purge Air Inlet

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 by HTag Pro, All keys lost


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 P1F92
OBD II Fault Code P1F93
OBD II Fault Code P1F94
OBD II Fault Code P1F95
OBD II Fault Code P1F96
OBD II Fault Code P1F97
OBD II Fault Code P1F98
OBD II Fault Code P1F99
OBD II Fault Code P1F9A
OBD II Fault Code P1F9B
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