Is your Kia Optima engine have a rough idle, and the check engine light is on due to a faulty oxygen sensor? Learn how to fix the problem by replacing your vehicle’s oxygen sensor. This guide is step-by-step instructions on how to replace the O2 sensor on a 2016-2020 Kia Optima.
This tutorial will teach how to replace the oxygen sensor (O2) on a Kia Optima. This guide provides instructions on how to replace both the upstream (Bank 1 Sensor 1) and downstream (Bank 1 Sensor 2).
What you will need
- O2 Sensor (Kia Optima)
- O2 sensor socket
- Open the hood, pull the hood release under the dashboard, and go into the vehicle. Then unlock the hood latch and pull the hood up.
- Locate the O2 sensor (Bank 1 Sensor 1) at the top of the exhaust manifold.
- Remove the O2 sensor on the top using a socket designed to loosen the O2 sensor.
- Follow the cable of the O2 sensor above and disconnect the clip by pushing it and pulling it out.
- To locate the lower O2 sensor (Bank 1 Sensor 2), Jack up the vehicle and support the vehicle with jack stands.
- Go under the vehicle and locate the O2 sensor behind the engine.
- Remove it using a wrench, follow the cable and disconnect the connector.
It is not necessary to replace both oxygen sensors at the same time. While replacing both sensors simultaneously is recommended, replacing only the faulty O2 sensor is acceptable.
Check Engine Light Still On
If the check engine light is still on after replacing your vehicle’s oxygen sensor, you can use the YOUCANIC Full System Scanner to clear the stored codes. This scanner can read and clear fault codes through every vehicle’s control module.
We hope you find the Kia Optima Oxygen Sensor Replacement DIY guide helpful. Check these troubleshooting and repair guides for more help on your Kia.