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Home >> Hyundai >> 2014 >> Equus Signature >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0091: Fuel Pressure Regulator 1 Control Circuit Low >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Signal check
  1. Poor connection
  2. Short to ground in control circuit
  3. FPR
Enable Conditions
  • B+ 10V ~ 16V
Threshold value
  • Short circuit to ground
Diagnosis Time
  • Continuous
MIL On Condition
  • 2 driving cycle
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