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Home › Kia › 2018 › Sedona SX › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (3 Of 3) › DTC P053F: Cold Start Fuel Pressure Performance › System Inspection

System Inspection

■ Check the fuel filter for blockage 

Remove the fuel pump and check filter debris and clogging of the fuel supply line.

■ Check the fuel level 

If you run out of fuel significantly on ramp, it may be a factor of degradation of the fuel pressure.

■ Check low-pressure fuel supply line leakage and blockage 

Low-pressure fuel supply line damage and blockage can be a factor of the fuel pressure drop.

■ Check Fuel Pressure Regulator 

* Check Fuel Pressure Regulator performance by measuring voltage.

  1. Back probe and measure voltage using KDS and connecting channel A (+) voltage probe to High side and channel B (+) voltage prove to Low side.
Fig 1: Screen Display - Normal Waveforms Of FPR At Engine Idle
G12284440Courtesy of KIA MOTORS AMERICA, INC.
Fig 2: Screen Display - Normal Waveforms Of FPR At Approx. 2000 RPM
G12284441Courtesy of KIA MOTORS AMERICA, INC.

Channel A: FPR High - Max at Approx 14.2V

Channel B: FPR Low - Max at Approx 15.3V

■ Confirm Part Inspection 

  1. Are all listed items normal?

    YES 

    NO 

    • Carefully re-do this troubleshooting guide steps.
    • If no problems were found with the circuits or connectors, replace the FPCV and go to "VERIFICATION OF REPAIR " procedure.
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