Sylvie Willis
The air fuel ratio sensor, also known as the oxygen sensor, is an important component of the Lexus RX300 engine. It measures the volume of oxygen in the exhaust to determine whether the engine is receiving the right amount of fuel. Over time, the sensor can deteriorate and begin to fail, causing issues such as a rough idle or engine stalling. When this happens, the Check Engine light will illuminate on the dashboard, along with the Track Off and VSC lights. Replacing the air fuel ratio sensor can cost between $158 to $268, with labour costs ranging from $61 to $78 and parts costing $97 to $190. This article will provide a step-by-step guide on how to replace the air fuel ratio sensor in a Lexus RX300, including where to find affordable parts and how to reset the CEL.
| Characteristics | Values |
|---|---|
| What it does | Measures the volume of oxygen present in the exhaust and determines whether the Lexus RX300 engine receives adequate fuel |
| Signs it needs replacing | Check Engine light comes on, engine may stall when idle, rough idling |
| Cost of replacement | $158 to $268 |
| Labour costs | $61 to $78 |
| Parts costs | $97 to $190 |
| Preparation | Put car on ramps the night before, spray plug with WD-40 or PB Blaster |
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What You'll Learn
Signs your Lexus RX300 needs a new air fuel ratio sensor
The air fuel ratio sensor in your Lexus RX300, also known as the oxygen sensor, measures the volume of oxygen in the exhaust and determines whether the engine is receiving enough fuel. When this sensor begins to fail, you will notice a number of issues with your car.
The first sign that your Lexus RX300 needs a new air fuel ratio sensor is that the Check Engine light will come on. Along with this, the Track Off and VSC lights will also illuminate. When this happens, you should get a mechanic to inspect your car and identify the fault. They will be able to tell you if the air fuel ratio sensor needs to be replaced.
Another sign that the sensor is failing is that the engine may stall when it is idle, or you may notice that the idling is rough. If you experience these issues, get the sensor checked and if it is faulty, replace it right away to avoid further problems.
The air fuel ratio sensor can last for thousands of miles, but with age and normal wear and tear, it can deteriorate and begin to fail. If you notice any of the above issues, it is important to get the sensor checked and replaced if necessary to maintain optimal engine performance.
The cost of replacing the air fuel ratio sensor in a Lexus RX300 ranges from $158 to $268. Labor costs vary from $61 to $78, while parts will cost you another $97 to $190. These prices do not include taxes and fees.
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How to identify a faulty air fuel ratio sensor
When the air fuel ratio sensor in a Lexus RX300 goes bad or malfunctions, it sends incorrect information to the vehicle's computer, causing the car to burn more fuel. This will lead to a constant issue with the vehicle offering fewer miles per gallon.
There are a few ways to identify a faulty air fuel ratio sensor. Firstly, the Check Engine Light will come on. Along with this, the Track Off and VSC lights will also illuminate. When this happens, get a mechanic to inspect your Lexus RX300 to identify the fault and, if necessary, replace the faulty or failing air fuel ratio sensor.
You may also notice reduced engine performance. The engine may be sluggish to react, and you may experience rough idling. This is because the vehicle's computer needs to precisely calculate the air fuel mix ratio when the engine is idle, and this calculation can go wrong if the sensor is faulty.
Error codes can also be a sign of a faulty air fuel ratio sensor. For example, the Lexus RX300 error codes 1130 and 1135 indicate an air and fuel sensor check.
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Cost of replacing a Lexus RX300 air fuel ratio sensor
The air fuel ratio sensor in a Lexus RX300 measures the volume of oxygen present in the exhaust and determines whether the engine is receiving adequate fuel. When the sensor is failing, the Check Engine light will illuminate on your dash, along with the Track Off and VSC lights. You may also notice that the engine stalls when it is idle, or that the idling is rough. If you experience any of these issues, get the sensor checked and, if necessary, replace it.
The cost of replacing a Lexus RX300 air fuel ratio sensor ranges from $158 to $268. Labour costs vary from $61 to $78, while parts will cost you another $97 to $190. These prices do not include taxes and fees.
You can find the best Lexus RX300 air fuel sensor parts at PartsGeek.com, an online store for Lexus parts and accessories. Alternatively, you can replace the sensor yourself by following online guides.
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DIY: replacing an air fuel ratio sensor
The air fuel ratio sensor in a Lexus RX300 measures the volume of oxygen present in the exhaust and determines whether the engine is receiving adequate fuel. When the sensor is failing, the Check Engine light will illuminate on your dash, along with the Track Off and VSC lights. You may also notice that the engine stalls when it is idle, or that the idling is rough.
To replace the air fuel ratio sensor yourself, you will need to put your car on ramps the night before, spray the plug with WD-40 or PB Blaster, unplug the old sensor wire, remove the old sensor, insert the new sensor, plug in the new sensor wire, and reset the CEL.
The cost of replacing the Lexus RX300 Air Fuel Ratio Sensor ranges from $158 to $268. Labor costs vary from $61 to $78, while parts will cost you another $97 to $190. These prices do not include taxes and fees.
You can find affordable parts online, but it is recommended that you get a mechanic to inspect your Lexus RX300 to identify the fault and determine if replacement is necessary.
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Air fuel ratio sensor parts
The air fuel ratio sensor, also known as the oxygen sensor, measures the volume of oxygen present in the exhaust and determines whether your Lexus RX300 engine is receiving the right amount of fuel. Over time, the sensor can deteriorate and begin to fail. When this happens, the Check Engine light will illuminate on your dashboard, along with the Track Off and VSC lights. If you notice these warning signs, get a mechanic to inspect your Lexus RX300 to identify the fault and, if necessary, replace the faulty or failing air fuel ratio sensor.
The cost of replacing the Lexus RX300 Air Fuel Ratio Sensor ranges from $158 to $268. Labour costs vary from $61 to $78, while parts will cost you another $97 to $190. These prices do not include taxes and fees.
You can find the parts you need at PartsGeek, an online store for Lexus parts and accessories. They carry a large inventory of aftermarket Lexus RX300 air fuel ratio sensors at affordable prices.
- Put the car on ramps the night before.
- Spray the plug with WD-40 or PB Blaster.
- Unplug the old sensor wire.
- Remove the old sensor.
- Insert the new sensor.
- Plug in the new sensor wire.
- Reset the CEL.
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Frequently asked questions
When the Lexus RX300 air fuel ratio sensor is failing, the Check Engine light will illuminate on your dash. Along with that, the Track Off and VSC lights will also come on. You may also notice that the engine stalls when it is idle, or that the idling is rough.
Lexus air fuel ratio sensor replacement costs anywhere between $158 to $268. Labor costs vary from $61 to $78 while parts will cost you another $97 to $190. These prices do not include taxes and fees.
You can find Lexus RX300 air fuel ratio sensor parts at PartsGeek.com.
