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.
Throttle Position Sensor Inspection
Turn ignition off. Disconnect TPS harness connector. Using ohmmeter, check resistance between TPS terminals No. 1 and 4. See Fig 1 . Resistance should be 350-650 ohms. Connect ohmmeter between TPS terminals No. 1 and 2 on Sonata V6 or terminals No. 1 and 3 on all other models. Operate throttle from closed to WOT position. Monitor ohmmeter while opening throttle. Ohmmeter needle should move accordingly with throttle movement. Replace TPS if it fails any of above tests.
NO RELATED
Use the Manual With the Right Hardware
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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.