Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2018 Kia Cadenza TechnologyFACTORY OEM SERVICE PROCEDURE

Repair procedures: Inspection

Connect the KDS to the vehicle's data link connector (DLC).
Check for DTCs and repair according to the DTC guide.
Check the power supply voltage provided to the fuel pressure sensor (FPS).
Specification : 5V

Fig 1: Check Power Supply Voltage To Fuel Pressure Sensor
Courtesy of KIA MOTORS AMERICA, INC.
Check the voltage provided to the fuel pressure sensor (FPS) at idle.
Specification : 1.9 - 3.2 V

Fig 2: Check Voltage To Fuel Pressure Sensor
Courtesy of KIA MOTORS AMERICA, INC.
Check the fuel pressure in the low fuel line.
(Refer to Fuel Delivery System - "FUEL PRESSURE TEST ")

Items	Specification
start	Max. 600 kPa (Max. 6.1 kgf/cm² , Max. 87.0 psi)
in operation	350 - 500 kPa (3.5 - 5.1 kgf/cm² , 50.7 - 72.5 psi)

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.