Why is the O2 sensor on my car so slow?
If you are getting bad fuel economy but increased power, chances are the engine is now running rich. If there was something wrong with performance when the sensor was attached, it must have been running lean. Either way, it needs the attention of a mechanic.
How do you replace the O2 sensor in a car?
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. Open the fuse panel in the driver-side foot well, under the steering column, by pulling down on it with your fingers.
Can a failed O2 sensor cause a yellow check engine light?
Yes, you will get a yellow check engine light but it will not prevent you from driving the car. Emissions will be worse with a failed O2 sensor (because closed loop control of the process is impossible so there will be either too much HC and CO or too much NOx depending on whether you have a lean or a rich mixture).
Why is my car sputtering after installing new O2?
Which is fine, the engine can run fine in open loop, probably wouldn’t even notice anything unless you were coming close to some performance limit or another. But when you switched to the new sensors, that confused the ECM, as it had been compensating for the bad sensor.
What does the O2 sensor on my car do?
If you like to tinker with your car, or add performance parts to increase horsepower, such as a larger throttle body, nitrous or even headers, the O2 sensor will likely tell the ECU the engine is producing too much pollution and the “Check Engine” light will illuminate.
How long does it take for O2 sensor to warm up?
As said above, you shouldn’t note any difference in performance, old vs new, until the sensors warm up to operating temperature, which can take 5-10 minutes. If you do note some difference, post back. If the car simply won’t run well with the new sensors, it could still be , and indeed likely, that the new sensors are ok.
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.
Which is fine, the engine can run fine in open loop, probably wouldn’t even notice anything unless you were coming close to some performance limit or another. But when you switched to the new sensors, that confused the ECM, as it had been compensating for the bad sensor.