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OBD II Fault Code P0091 :

Description of OBD II Fault code P0091

FUEL RAIL PRESSURE (FRP) REGULATOR CONTROL CIRCUIT LOW VOLTAGE

Possible failuer of OBD II Fault code P0091

  • FRP REGULATOR solenoid harness short to ground.
  • FRP REGULATOR solenoid malfunction.

Diagnostic Procedure using AutoHex auto Scan tool tester

  • FRP REGULATOR driver detect that abnormal current during predetermined duration.

Test Conditions using AutoHex Scan tool tester

  • Engine running.

Clear Fault codes Conditions

  • FRP REGULATOR driver detect that abnormal current during predetermined duration.

MIL Status

  • Check Engine Light ON


Note:

  • AutoHex is a professional OBD /OBD II diagnostic scanner / scan tool tester.
  • 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 OBD scanner

More OBD II Fault codes:

OBD II Fault Code P0092
OBD II Fault Code P0093
OBD II Fault Code P0094
OBD II Fault Code P0095
OBD II Fault Code P0096
OBD II Fault Code P0097
OBD II Fault Code P0098
OBD II Fault Code P0099
OBD II Fault Code P009A
OBD II Fault Code P009B
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