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Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) (PHEV) >> DTC P0091-00: 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
  • Electrical Monitoring
  1. Poor Connector Connection
  2. Short to Ground in Fuel Pressure Regulator Control Circuit
  3. Faulty Fuel Pressure Regulator
Enable Conditions
  • Battery voltage higher than 10V and lower than 16V
Threshold Value
  • Control Circuit shorts to ground
Diagnostic Time
  • 0.8s
MIL ON Condition
  • 2 Driving Cycles
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