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Optima LX, Standard
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Repair and Diagnosis (Single Page)
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Engine Performance
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System
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Engine Control System Diagnosis (1 Of 3) - 2.4L
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DTC P0091: Fuel Pressure Regulator 1 Control Circuit Low
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General Information
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Signal Waveform & Data
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Signal Waveform & Data
Fig 1: Scantool Data Of Fuel Pressure Regulator (Normal At Idle)
Courtesy of KIA MOTORS AMERICA, INC.
Normal idle state.
Fig 2: Scantool Data Of Fuel Pressure Regulator (Short To Ground)
Courtesy of KIA MOTORS AMERICA, INC.
When FPR circuit shorts to ground.
Courtesy of KIA MOTORS AMERICA, INC.
Courtesy of KIA MOTORS AMERICA, INC.