2012 Hyundai Accent Oxygen Sensor Replacement - IFixit

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Introduction

One item that commonly breaks in modern cars is the oxygen, or O2, sensor. When they go bad, it can lead to rough idle, and if ignored, will leave motorists stranded. It is very easily diagnosed by a trouble code or check engine light. Many auto parts stores will scan cars for free, and the code provided will indicate if there is a bad O2 sensor, as well as many other possible issues. If your 2012 Hyundai Accent O2 sensor has failed, follow this guide to replace it.

This fix will involve finding the sensor, unplugging it, unthreading it, and reinstalling a new sensor in its place.

Reminder: Engine bays are usually very dirty, so a pair of work gloves or nitrile gloves can make clean-up easier. Thinner gloves are better for dexterity since there is a small plug to manipulate.

Reminder: More lighting is never a bad thing. Headlights, a friend holding a flashlight, or magnetic lights, while not a requirement, will definitely help.

What you need

1. Step 1 Oxygen Sensor

   

   • Never work on a hot vehicle. Allow your car to cool for at least 4 hours before performing maintenance.

   • Never work on any automotive electronics without first disconnecting the negative (-) terminal.

   • Use a 10 mm wrench to loosen bolt on the battery's negative (-) cable, then slide it off the (-) negative post.

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