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.

2005 Kia Optima EX, 2.4 6FACTORY OEM SERVICE PROCEDURE

Throttle Position Sensor (TPS) Adjustment

Connect a HI-SCAN to the data link connector.

Fig 1: Connecting Scan Tool
Courtesy of KIA MOTORS AMERICA, INC.
If a HI-SCAN is not used, connect a digital type voltmeter between connector terminals 1 and 3.
Turn the ignition switch to the ON position (do not start engine) and check that the TP Sensor output voltage is as specified. If a HI-SCAN is used, read the voltage.
Standard value: 300-900 mV

Fig 2: Checking Throttle Position Sensor (TPS) Output Voltage
Courtesy of KIA MOTORS AMERICA, INC.
If it is out of specification, loosen TP Sensor mounting screws and adjust by turning the TP Sensor.

Fig 3: Adjusting Throttle Position Sensor (TPS)
Courtesy of KIA MOTORS AMERICA, INC.

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.