In this guide, you will find step-by-step instructions on 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
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
- Oxygen Sensor Socket
- Kia Oxygen Sensor
- Start by turning off the ignition. Next, open the hood. We recommend disconnecting the negative battery terminal.
- Locate the upstream oxygen sensor Bank 1 Sensor 1.
- Disconnect the oxygen sensor electrical wire.
- Remove the oxygen sensor using an oxygen sensor socket. To remove the sensor you need to turn the ratchet counter-clockwise. The old sensor may be stuck. If so, use penetrating fluid to loosen up the stuck 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.
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.
- Oxygen Sensor: 45 ~ 49 N.m (30 ~ 35 lb-ft)
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)|
HO2S [Bank 1/Sensor 1]
|Heater Resistance (?)||2.5 ~ 4.0 [20?C(68?F)]|
HO2S [Bank 1/Sensor 2]
|A/F Ratio (?)||Output Voltage(V)|
|Heater Resistance (?)||3.3 ~ 4.1?[21?C(69.8?F)]|