LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) (PHEV) >> DTC P0090-00: Fuel Pressure Regulator 1 Control Circuit/Open >> DTC Information >> DTC Detecting Condition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Electrical Monitoring
  1. Poor Connector Connection
  2. Open in Fuel Pressure Regulator Circuit
  3. Faulty Fuel Pressure Regulator
Enable Conditions
  • Battery voltage higher than 10V and lower than 16V
  • Engine speed lower than 4000 RPM
Threshold Value
  • Open circuit
Diagnostic Time
  • Continuous
MIL ON Condition
  • 2 Driving Cycles
scientia non olet · About LEMON Manuals