Are aftermarket O2 sensors any good?

It's true that you may find an aftermarket oxygen sensor that's advertised as better than OEM. There's still no guarantee that it'll outperform an OEM oxygen sensor when it comes to working with your ECU and withstanding the continuous exposure to hot exhaust.

Does it matter what brand O2 sensor I get?

The best brand will depend on your needs and the model of your vehicle. Some brands only make oxygen sensors for specific vehicle models. Some of the best brands for oxygen sensors are Bosch, Denso, NGK NTK, ACDELCO and Spectra.

What brand O2 sensor is best?

Will a new O2 sensor improve performance?

Those symptoms could also be indications of other problems, but the EPA says that replacing a bad oxygen sensor can improve fuel economy by as much as 40 percent, so clearly that is one place to look if your vehicle develops a greater thirst for gas.

Do O2 sensors affect engine performance?

A bad O2 sensor should not affect engine starting, cause a misfire (unless the spark plugs become carbon fouled), or cause engine stalling or hesitation problems. A sluggish or fouled O2 sensor will typically read low (lean) and cause the engine to run rich.

O2 Sensor OEM vs Aftermarket ($60 Amazon) Subaru Outback/Legacy GT

Does oxygen sensor affect acceleration?

Can a bad O2 sensor cause poor acceleration? Yes, a lousy sensor sends wrong messages to the car's Powertrain Control Module that controls the fuel ratio your vehicle uses. Improper balance causes incomplete combustion, which interferes with power transmission to the mechanical parts that drive the car.

What O2 sensors affect mpg?

Oxygen sensors monitor exhaust

A worn-out oxygen sensor can reduce your gas mileage.

Should you replace all O2 sensors at the same time?

Do I need to replace all of the sensors at once? It is best to replace O2 sensors in pairs. For example, if you replace the downstream left sensor, you should also replace the downstream right.

Will check engine light reset after replacing O2 sensor?

Hi There, The last diagnosis is correct in that the sensor replaced caused the check engine light to turn off. In some cases they do not always turn off immediately and take a bit of driving for the computer to recalibrate and recognize that the problem has been corrected.

Will an O2 sensor work without a catalytic converter?

The in-cat or after-cat O2 sensors are just used to check the efficiency of the cat itself. Therefore, in most modern vehicles a car can run just fine without a cat.

Are all oxygen sensors the same?

Even though both O2 sensors are four wire, heated O2 sensors, there are definitely differences that the Motronic can detect. You must use the correct ones, whether oem with the correct length cable and plug, or the correct "universal" equivalent, that will require you to measure and splice your old plug onto it.

What is the difference between heated and unheated oxygen sensors?

The only difference between the two is that the three-wire sensor shares a common ground between the heater and sending circuits. Therefore, a heated oxygen sensor is more efficient than an unheated sensor.

Is there a difference between upstream and downstream oxygen sensors?

The upstream sensor monitors the level of pollutants in the engine's exhaust and sends this information to the ECU that continuously adjusts the air-fuel ratio. The downstream sensor measures the level of pollutants passing through the catalytic converter.

Are Delphi O2 sensors good?

Delphi Technologies planar oxygen sensors have the fastest activation time which is the best in the industry and twice as fast as the nearest competitor's. But wait there's more - three times more planar coverage than our closest competitor.

Are NTK O2 sensors good?

Yes, the NTK WBO2 sensor is a better choice for forced induction engines. It's also more robust, slightly more accurate, lasts longer with race fuels.

Is NTK and NGK the same?

Two brand names with trust

NGK SPARK PLUG CO., LTD. produces IC packages, sensors for exhaust gas cleaning, ceramic tools and other items under the "NTK" brand.

Should I disconnect battery when changing O2 sensor?

Do I need to disconnect the battery when changing out the O2 sensor? No, there is no need to disconnect the battery when replacing O2 sensors.

What is the code for a bad oxygen sensor?

Once the oxygen sensor stops performing as intended, the vehicle computer detects that and turns on the Check Engine light. This will usually have a diagnostic trouble code (DTC) of P0138. Typically, you'd take the vehicle into the shop, where they'd diagnose the issue and replace the oxygen sensor for you.

How long do O2 sensors last?

And lastly, how long do oxygen sensors typically last? Older vehicles have O2 sensors that will typically last 30,000 to 50,000 miles, or 3 to 5 years. Newer vehicles employ sensors with an additional heated element and these new sensors are more likely to last to 100,000 or 7-10 years.

Can a downstream O2 sensor cause rough idle?

Yes, your o2 sensor can make your engine idle roughly.

This is because the o2 sensor determines the air to fuel ratio. If the sensor goes bad, this function could be disrupted and cause a rough idle.

Are downstream O2 sensors important?

Input from the downstream O2 sensor(s) is used to detect any problems with the converter(s), and to fine-tune fuel trim. If a fault occurs in an O2 sensor or its internal heater or wiring circuit, the OBD II system should detect the problem, set one or more fault codes and turn on the Check Engine light.

Should you replace O2 sensors when you replace catalytic converter?

O2 sensor is an emission system part. If their contention is that the sensor is good but can't be safely removed and replaced without damage when replacing the cat, that's their problem not yours. It should be done on their time and shouldn't cost you.

What does a secondary oxygen sensor do?

The vehicle's 02 sensor is used to measure the amount of oxygen in the exhaust and report this feedback to your vehicle's computer. The computer then uses this information to adjust your air/fuel mixture.

Will a oxygen sensor stop a car from running?

The only problem will be that your vehicle will run sluggishly or roughly, or it will stall. The default, limp-home fuel setting of an engine computer unit that receives no signal from the O2 sensor is an overly rich mixture.

What do post cat O2 sensors do?

The pre-catalytic converter oxygen sensor is used for fuel trim and the post-catalytic converter oxygen sensor is used to monitor converter efficiency.