What happens if I don't replace a bad O2 sensor? If an oxygen sensor fails, the engine computer won't be able to correctly set the air-fuel ratio, which could result in lower fuel economy, higher emissions and damage to other components, such as an overheated catalytic converter.
As a consequence, Can you keep driving with a bad O2 sensor?
Yes, you can drive with a bad oxygen sensor if you can still start your engine and feel little difficulty driving. But don't leave it alone for over a couple of days, as it might cause safety problems and lead to the malfunction of other parts of your vehicle.
Also, What happens if you drive with a broken oxygen sensor? Driving with a faulty O2 sensor means the computer won't be getting the correct reading of the mixture and hence it won't be able to adjust the air-fuel mixture properly. As a result, the engine will be less efficient and consume more fuel because of the overly rich mixture.
Nevertheless, How serious is a bad O2 sensor?
If the oxygen sensor is going bad, the fuel-delivery and fuel-combustion systems will be thrown off. If a bad oxygen sensor disrupts the air to fuel ratio mixture, or too much fuel is injected into the engine, your vehicle's gas mileage will be reduced.
Do I need to replace both oxygen sensors?
O2 sensors are a "wear item" and are recommended to be replaced every 75k mi. (if I remember correctly, check the FSM). Consider them part of a really proper tune-up regimen. Simply put, they are providing one set of input for your fuel injection system so it can manage things optimally.
Related Question for What Happens If I Don't Replace A Bad O2 Sensor?
How many miles can you drive with a bad oxygen sensor?
Newer oxygen sensors are supposed to work efficiently for 60,000 to 90,000 miles, depending on the model of your car. If your mechanic determines that your car's problem is due to a bad or failing oxygen sensor, the replacement shouldn't take long and you'll be ready to tackle many more miles on the road.
How many miles can you drive with a bad O2 sensor?
Under $50: Most oxygen sensors within this price range will work well with most cars but won't offer the durability that comes with the high-end versions. They may offer a service life of only 20,000 to 40,000 miles.
What can cause an O2 sensor to fail?
O2 sensor failures can be caused by various contaminants that enter the exhaust. These include silicates from internal engine coolant leaks (due to a leaky head gasket or a crack in a cylinder wall or combustion chamber) and phosphorus from excessive oil consumption (due to worn rings or valve guides).
Can a bad O2 sensor cause bucking?
Bad O2 won't cause bucking, but it will cause reduced fuel economy due to the ECM being in fault loop mode.
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