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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Engine Control System Diagnosis - 2.0L (1 Of 3) (Except HEV)) >> DTC P0091: Fuel Pressure Regulator 1 Control Circuit Low >> Component Inspection

Component Inspection

WARNING: This page is about a different variant/trim than selected.

■ Fuel Pressure Regulator Valve (FPR) Inspection 

  1. IG "OFF".
  2. Disconnect the Fuel Pressure Regulator Valve (FPR) connector.
  3. Connect probes to each terminal of the Fuel Pressure Regulator Valve (FPR) connector.
  4. Measure Fuel Pressure Regulator Valve (FPR) resistance.

    Specification:  Approx. 0.41 Ω

  5. Is the measured resistance within specifications?

    YES 

    • Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Substitute with a known - good Fuel Pressure Regulator Valve (FPR) and check for proper operation. If the problem is corrected, replace Fuel Pressure Regulator Valve (FPR) and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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