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Home >> Kia >> 2005 >> Rio Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> DTC Troubleshooting >> DTC P0133: Ho2S Circuit Slow Response (Bank 1, Sensor 1) >> Inspection/Repair >> System Inspection >> Fuel Pressure Inspection

Fuel Pressure Inspection

  1. Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
  2. Install a fuel pressure gauge.
  3. Inspect fuel pressure with engine idling at normal operating temperature.
    1. Test Condition: Ignition "ON" & Engine "ON" & Vacuum hose disconnected at Idle
    2. Specification: 320~350 kPa (3.2~3.5 kg/cm2 , 46~51 psi)
  4. Is the fuel pressure within the specified value?

    YES

    1. Go to "FUEL INJECTOR INSPECTION " procedure as below.

    NO

    1. Repair as necessary refer to inspection note as below and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      CAUTION:
      1. Check if fuel line pressure decreases when accelerating quickly.
      1. If it does, check fuel pump maximum pressure. If pressure is OK, check fuel line and filter for clogging.
      2. If fuel pressure is lower than specification: Check for fuel line pressure while pinching fuel return hose.
      1. If pressure quickly increases, check pressure regulator.
      2. If pressure gradually increases, check for clogging between fuel pump and pressure regulator. If hose is not clogged, check fuel pump maximum pressure.
      3. If fuel pressure is higher than specification: Is fuel line clogged?
      1. If it is not, replace pressure regulator.
      2. If it is, replace it
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