What does the oxygen sensor on a Toyota Corolla do?
The oxygen sensor in your Toyota Corolla is a electronic component that senses the amount of oxygen entering your car’s engine and sends this data to the on-board computer so the proper amount of fuel is sent to the engine. If the oxygen level measurement is off, too little or too much fuel is sent…
What causes a lean code on a Toyota Corolla?
If you see a lean code on this year Corolla, it is usually caused by a faulty oxygen sensor in front of the converter or an air/vacuum leak. Note: Also, verify the evaporative purge solenoid is not stuck open or being grounded all the time by the Engine Control Module (ECM).
Why does the Check Engine light come on on my Toyota Corolla?
Oxygen sensors can change the way that your Corolla’s engine runs. Most of the time, the check engine light will come on. It’s a good thing that the check engine light would come on, as there is more than one oxygen sensor, and they can be difficult to get to and test.
What happens when an O2 sensor goes bad in a Toyota?
When your O2 sensor is going bad, your ECM can’t probably adjust the mixture. When an oxygen sensor is bad in your Toyota, expect the following issues: Poor fuel economy. Depending on the location of the sensor, the fuel delivery and combustion systems can become extremely irregular by a bad O2 sensor.
How to check and replace an oxygen sensor ( air )?
A P1155 or P1135 code indicates you have a bad sensor. This is common in Toyota and Lexus cars and trucks. Learn how to test the air fuel ratio sensor to see if it is bad, and then learn how to replace the bad sensor. Nice O2 Sensor Socket Kit: http://www.amazon.com/gp/product/B005…
When to reset the ECU after changing an O2 sensor?
Sometimes an O2 sensor fails, and you need to replace it. Once you’ve replaced your vehicle’s O2 sensor, you’ll need to reset the ECU so it can properly gather information from the new O2 sensor.
Can a bad oxygen sensor cause poor gas mileage?
Poor Gas Mileage One symptom of a bad oxygen sensor is your Corolla using an excessive amount of gas. The sensor is not sending the correct oxygen reading to the computer–or not sending a reading at all–so the on-board computer sends too much fuel to your Corolla’s engine.
How does the oxygen sensor work in a car?
Average rating from 4,883 customers who received a Check Engine Light is on Inspection. The oxygen sensor in your vehicle measures oxygen levels in the exhaust gases exiting the engine. This information is used by the Powertrain Control Module (PCM) to determine the correct air to fuel ratio for your engine in real time.
Can a bad oxygen sensor cause a car to run erratically?
If the oxygen level measurement is off, too little or too much fuel is sent to your engine, and your car will run erratically. The oxygen sensor is a key component in your Corolla. When the device is not functioning correctly, symptoms do present themselves. One symptom of a bad oxygen sensor is your Corolla using an excessive amount of gas.
Where is the oxygen sensor in the engine?
An Oxygen sensor that is between the catalytic converter and the engine is known as an “upstream” sensor. Oxygen sensors after the catalytic converter are “downstream sensors”. As a rule, the upstream sensor is more important for engine timing and air/fuel ratios.