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How to replace Kia Oxygen Sensor

In this guide, you will learn how to change the oxygen sensor on Kia vehicles.


When the oxygen sensor fails on your Kia you may notice one or all of the following issues: 

  • Check Engine Light is ON
  • A decrease in fuel economy
  • Engine hesitation or misfire
  • Rough engine idle

Getting started

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

Install new oxygen sensor

Install the new oxygen sensor on your Kia.

When using a Kia OEM oxygen 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

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 and Hyundai Sonata as well. 

Torque Specifications

  • Oxygen Sensor: 45 ~ 49 N.m (30 ~ 35 lb-ft)

Fault Codes

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. 


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


Paul, 2016-12-30

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

Britt, 2017-07-12

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.


JimsAutoRepair, 2019-06-29


You wouldn't need anything accept for the above mentioned tools and a simple screwdriver

Visitor, 2017-07-15

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?

Dewey, 2019-06-01

I got a 2002 Kia Sportage 4x4 downstream 02 sensor po141 keeps coming back put two new 02 sensor in same thing want is the problem

Felix V, 2019-07-15

where is the upstream O2 sensor on a 2009 Kia Sedona?

By YOUCANIC on May 29, 2019


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