The Lexus S is actually classified as an SC The "C" stands for "coupe," which is the only way the S model is available. The is related to the 4. First manufactured inthe SC features four oxygen sensors. Two located up front on the converters bolted to the manifolds one per engine sideand two more located near the two rear catalytic converters.
Determine which oxygen sensor needs to be replaced.
Lexus SC430 Oxygen Sensor Replacement at your home or office.
Plug a code reader or scan tool into the diagnostic link connector located beneath the driver's side dashboard. Turn the Lexus SC ignition to the "accessories" position. Follow the directions of the code reader or scan tool to discover which sensor has failed. Bank one-sensor one is the forward-most towards the engine sensor located on the same side as the number one cylinder. Bank one-sensor two is downstream on the same side, near the rear catalytic converter. Respectively, the two sensors for bank two are positioned in the same way on the opposite side of the engine and exhaust.
Lift the SC if you're replacing one of the number two sensors. The number one sensors may be easier to access from the engine compartment on either side of the engine by the manifold. Follow the wire harness of the sensor you're going to replace until you find the plug. It will be eight or nine inches away from the sensor.
Disconnect the plug of the sensor from the plug of the wire harness. Use the oxygen sensor socket and a flex-head ratchet to remove the sensor from the exhaust porthole. A 22 mm wrench can also be used, but the amount of room available may restrict its effectiveness. Turn the sensor counterclockwise from the exhaust porthole to remove. Remove the sensor. Thread the new direct-fit sensor into the exhaust porthole by hand to assure you're not cross-threading it.
Snugly tighten the sensor with the socket and ratchet or the 22 mm wrench. Do not over-tighten the sensor because the threads on the sensor can easily strip.
Rescan the PCM using the code reader or scan tool. Follow the directions to erase the code to clear the check engine light.Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The code means the the sensor is taking too long to warm up. What does this mean? The auto repair labor rates vary widely across the country, and even within the same city. The current amperage in the front heated oxygen sensor heater circuit is out of the normal range. An improper voltage drop signal is sent to ECM through the front heated oxygen sensor heater. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module ECM.
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load.
The ECM controls the heater element circuit by allowing current flow to ground. The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications. Get Access to Factory Service Manuals. Related Information. Repair Importance Level: 2. Why is the Engine Light ON?Some of the very latest models also now incorporate a NOx sensor as well.
Some vehicles can have 8 or more oxygen sensors fitted. Oxygen sensors are located within the exhaust stream, there is at least one oxygen sensor located before the catalytic converter and typically one in each exhaust manifold.
Depending on the exhaust system design there may be one or two located after the catalytic converter to monitor its effectiveness. So which o2 sensor do you need? Identifiying the type and location of your oxygen sensor will ensure you replace your old sensor with the correct new oxygen sensor.
So what does this mean, what is B1 or S1? Well what this is suggesting is that Bank 1 Sensor 1 is faulty. So what is Bank 1? Bank 1 is where the Number 1 cylinder is located. This is always the forward most cylinder. So what is Sensor 1?
Sensor 1 is the O2 sensor that is located before or upstream of the catalytic converter. So then if your diagnostic code is B1 S2 that means Bank 1 Sensor 2 down stream post-cat. Depending on the make, model and engine type of your vehicle oxygen sensors can be found in a variety of places. In the diagrams below we have detailed some of the more common locations.
Click on the image to enlarge. Cart No items added. Home Technical What is an Oxygen Sensor? Why replace oxygen sensors? How often to replace O2 sensors? Click to enlarge So what is Sensor 1? Oxygen Sensor Locations Depending on the make, model and engine type of your vehicle oxygen sensors can be found in a variety of places. Copyright O2sensors. All rights reserved.Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing. Average rating from customers who received a Oxygen Sensor Replacement.
Learn More. Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM. With each new model year, manufacturers are adding more oxygen sensors to better manage engine operation. Some high performance engines have an oxygen sensor for each cylinder as well as one for the rear of each catalytic convertor. The sensors are located either underneath the hood or underneath the car.
The oxygen sensors are connected screwed to the exhaust pipe, either in front or back of the catalytic converter. The front upstream sensors measure the amount of oxygen in the exhaust system. The purpose of the front oxygen sensor s is to measure how rich or lean the gases are as the gases exit the combustion chamber.
Depending upon whether the exhaust gas is lean high in oxygen content or rich low in oxygen contentthe amount of fuel entering the engine is adjusted by the engine management computer to try and maintain an ideal mixture that produces the lowest emissions output from the catalytic convertor.
Rear downstream sensors are located behind the catalytic converter. The purpose of the rear oxygen sensor s is to monitor the oxygen content of the exhaust gases leaving the catalytic convertor. If one or more of the oxygen sensors are faulty, your car may not pass the emissions test. If you drive your car with a faulty oxygen sensor, you may get poor gas mileage and it can damage the catalytic converter.
Keep up with the tune-ups. If check engine light is on, don't drive the car too long without getting it inspected. If check engine light is flashing, pull over and get the car towed to avoid costly repairs.
Ask the mechanic to inspect the vacuum hoses and leaks in the exhaust system. If the vacuum hose or exhaust system is leaking, it will display an oxygen sensor fault code.
Replacing an oxygen sensor may not fix the problem. Your vehicle has multiple oxygen sensors, and they all help the car run optimally. The front sensors measure how much oxygen is in the exhaust stream to measure how rich or lean the gases leaving the gas chamber are. The rear sensors measure the oxygen content of the gases as they leave the catalytic converter.
Because cars depend on an ideal fuel-to-air ratio to function optimally, the oxygen sensors are leaned on for engine performance. When your oxygen sensors fail your car will run less smoothly, get worse mileage, and have worse emissions.
Get an upfront price. Service Area. YourMechanic Benefits Online Booking. Mechanic comes to you. Free 50 point safety inspection.Lexus is a dedicated automobile manufacturer known for producing reliable and solid automobiles.
First-rate capability and engine performance depend on high-quality parts and accessories. Your high-performance vehicle absolutely demands the best premium replacement parts you can find. When your car or truck's ratio of fuel to air is not rich enough, inadequate performance will be observed; at the same time, a too-rich fuel mix may cause wear to your engine and unwanted air pollution from your car's tail pipe.
Generally installed next to the exhaust manifold, your Lexus SC Oxygen Sensor reports oxygen levels measured in the car or truck's fuel system to the engine computer. A high quality Oxygen Sensor monitors how much oxygen which is feeding your vehicle's cylinders. Your vehicle's Oxygen Sensor maintains the air to fuel proportion by evaluating it to guarantee optimum mileage. Oxygen Sensors are electronic parts that are installed in the exhaust system to improve fuel efficiency.How to Replace an Oxygen Sensor in Your Car (Air Fuel Ratio Sensor)
For the best service from your car or truck, you'll figure out that great parts create great performance - PartsGeek. They are available for the following Lexus SC years:,10, 09, 08, 07, 06, 05, 04, 03, Close X.
To return a part, simply submit a support ticket within 30 days of ordering and we will issue you an RMA number to return your product. See customer service page for refund and return details. We scour the web to make sure PartsGeek always has low prices. You can buy with confidence! Click to Enlarge. Replacement Oxygen Sensor. Shipping Options: Free Ground Shipping. Denso Oxygen Sensor. Features: Designed to detect the amount of oxygen in the exhaust system Constructed from high quality material Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing Manufactured with precision to meet OE standards Easy installation.
Product Note: Universal -- O. Quality Universal Replacement Sensor. Features: Manufactured to the highest O. Denso W Oxygen Sensor. Product SKU: W Shipping Options: Ground, Overnight, 2 Day. Wiring Harness Length Read more reviews. Part arrived promptly and works as expected.
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Get the Best Priced Lexus SC430 Oxygen Sensor
Show Quick Cart. Intentionally blank. No parts for vehicles in selected markets.By rockrivJune 11, in 01 - 10 Lexus SC My engine warning light is on, and turns out one of the oxygen sensors need replacing according to my dealer. How much would it cost to do it? I live in the Bay Area, so if you know someone that has done it before, the info would be greatly appreciated. How long can I drive the car with this issue before it becomes a problem. I think that's a bit high. I also own an sc However I am in the UK.
The engine light came on in May of this year. I drove for about miles without any problem. However for peace of mind I found out the problem was the O2 sensor. Two mechanics confirmed this. Make sure which one needs to be replaced.
There are four! One mechanic reccomended the two pre cat or top sensors. However after purchasing an ELM code reader from ebay, 50 uk pounds I pinpointed the fault to be the left bank, your drivers side, left hand drive cars, pre cat sensor.
The part cost uk pounds. Copy parts were available but I elected for the dealer part. A specific O2 sensor socket 22mm has to be used, 10 uk pounds. Securely raise the car. Remove the two engine covers, underneath the car. Disconnect the battery. Use gallons of wd40 penetrating oil or freeze spray, very effective.
Ensure the socket is fitted on the sensor securely, then loosen. Loosen the heat shield bolt on the connector cable. Very carefully dissconnect. Clean the area and refit the new sensor. Thats that! It is worth doing yourself. Beginning to end 5 hours.
You need daylight. Do not rush!
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