OBD II Fault Code P1F51 :

Description of Fault code P1F51

H2CBN Value Low

Possible failuer P1F51

• HGD Sensor 1(H2CBN) failure
• FCVSCM failure (Sensor Input Circuit, Sensor Power Supply Line)
• HGD Sensor 1(H2CBN) signal harness short-circuit
• HGD Sensor 1(H2CBN) power parness (SVCC/IGP) open-circuit
• AP1 Sensor Voltage Low (P2122)

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

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

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