Kia Oxygen Sensor Replacement Instructions

how to change oxygen sensor kia diy guide

In this guide, you will learn about Kia Oxygen Sensor issues such as: Common symptoms that indicate a bad Kia oxygen sensor (O2) Fault codes related to bad oxygen sensor How to change oxygen sensor on Kia vehicles.

Owners of Kia Forte, Optima, Rio, Sorento, Soul, Sportage, Sedona, Soul, Borrego will find this guide helpful. The pictures below were taken on a 2016 Kia Optima equipped with the 2.4L Theta II engine, which is the same exact engine used in other Kia models previously mentioned and Hyundai Sonata as well.  If you need help with finding Kia oxygen sensor location jump to the end of the article. 


The oxygen sensors play a crucial role on your Kia's fuel and emission system. When the oxygen sensor fails on your Kia you may notice some or all of the following issues: 

  • Check Engine Light is ON
  • Decrease in fuel economy
  • Engine Hesitation or misfire
  • Rough Idling

How to replace Kia Oxygen Sensor

Before you start replacing the oxygen sensor we need to identify which oxygen sensor needs to be replaced. On 2.0T and 2.4 L four-cylinder Kia engines there are two oxygen sensors. One is upstream of the catalytic converter, and one is downstream. In the following tutorial, we will show you how to replace the upstream sensor (Bank 1 Sensor 1). The procedure is the same for the downstream O2 sensor (Bank 1 Sensor 2). For the downstream sensor, you will find it easier to access the O2 sensor from underneath the car. 

What you will need


Open Hood

Start by turning off the ignition. Next, open the hood and disconnect the negative battery terminal. 

Locate the oxygen sensor

Location of upstream oxygen sensor Bank 1 Sensor 1 Kia. diy o2 sensor replacement kia rio soul sportage optima rio rondo borrego


Unplug the O2 connector

kia oxygen sensor replacement

Remove oxygen sensor

how to change oxygen sensor kia optima sedona forte soul

Install new oxygen sensor

Install the new oxygen sensor on your Kia. When using a Kia OEM exact fit O2 sensor you can plug the new sensor directly into the electrical socket. If you are using a universal O2 sensor you will need to splice and connect the wires. replacement guide oxygen sensor diy with pictures video

Torque Specifications

Tighten the new Oxygen Sensor to: 45 ~ 49 N.m (30 ~ 35 lb-ft)

If you are using a universal O2 sensor, use this link to check Kia Oxygen Sensor wiring diagram

Kia Fault Codes indicating a bad Oxygen Sensor

This is a list of fault codes related to oxygen sensors. Note that the oxygen sensor may not always be the problem. You may have other problems such as bad wiring harness for example. You can read these codes yourself using an OBD-II code reader and clear them once you complete the repair. 

Here is a partial list of Oxygen Sensor related fault codes. 

P0130 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0132 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
P0137 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
P0140 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
 * There may be other codes that point to a bad Oxygen Sensor. 

Kia Heated Oxygen Sensor Specifications

HO2S [Bank 1/Sensor 1]

Item Specification
Heater Resistance (?) 2.5 ~ 4.0 [20?C(68?F)]


HO2S [Bank 1/Sensor 2]

A/F Ratio (?) Output Voltage(V)
RICH Approx. 0.9
LEAN Approx. 0.04
Item Specification
Heater Resistance (?) 3.3 ~ 4.1?[21?C(69.8?F)]

Source: Kiopman

Kia Oxygen Sensor Location


Are you looking at the right oxygen sensor? Sure you don't want to replace the wrong O2 sensor and still have the check engine light on. Finding the location of the oxygen sensor on a Kia is easy. 

Location of oxygen sensor Kia (4-cylinder) cars

  • Four cylinder Kia engines have only one catalytic converter (Bank 1). The upstream, O2 sensor before the cat is Sensor 1. The downstream, O2 sensor after the catalytic converter is sensor 2. 

Location of oxygen sensor Kia (V6) cars, SUV, VANs

  • V6 engines have two catalytic converters.Catalytic  converter on the passenger side is Bank 1. Catalytic converter on driver side is Bank 2. Upstream sensors are called sensor 1, downstream sensor are Sensor 2. 


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user profile image
Paul made a comment.
2 years 4 months ago

I was quoted $230 for replacing the O2 sensor in my optima. It was so easy to replace following this guide. Thanks a lot.

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Britt made a comment.
1 year 10 months ago

If I were to go to Auto zone to get these tools myself for the OEM, what tools would I ask for?
Trying to replace 2013 Kia Soul 4cyl both o2 sensors.


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Visitor made a comment.
1 year 10 months ago

So, I replaced both O2 sensors on my 06 Spectra. But after about 2 weeks, I got the same error. Sensor 2. What do you all recommend I do?


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