What happens if you have a faulty o2 sensor

Signs a Vehicle has a Bad O2 Sensor. Let's not get ahead of ourselves. First, what are the signs an O2 sensor may have gone bad? Second, how many oxygen sensors does my vehicle have? Third, do I have to replace all O2 Sensors at the same time? What do Oxygen Sensors do? And lastly, how long do oxygen sensors typically last?

Are there ways to prolong the life of my O2 Sensors? Avoid low quality or discount gasoline. When diagnosed, we discovered the oxygen sensor has been permanently disconnected!

Pls advise me on what to do. Could the missing o2 sensor be the cause? That definitely could be the issue. Nice troubleshooting.

Replace the O2 sensor, clear the code, then see if the problem goes away. Thank you, April. An oxygen sensor has nothing to do with the fuel line, so there is no need to flush the fuel lines. Replacing an oxygen sensor is something you could potentially do yourself, yes.

Hi I did change o2 last year December bt now whn I do obd scan shows o2 again what advice can you give me for this problem. It may be the catalytic converter or an electrical issue, such as a bad ground.

More troubleshooting is needed to know for sure. I have a misfire code of P, with fuel status indicating open loop due to engine load or deceleration coupled with white greyish exhaust smoke. What could possibly be the problem? It could be spark plugs, plug wires or ignition coils , or the fuel injector on that cylinder. In nigeria. Are the o2 sensors same? I am not sure what it will cost over there. I have a Chevy hhr it will. Start up then after about 3 seconds the engine dies I replaced the fuel pump and the mass air sensor.

I can spray starting fluid after I start it as long as I spray that it will run. What do you think the problem could be? It sounds like there is a fuel restriction that is starving the engine of fuel.

I would do a fuel pressure test to see if the problem lies with the injectors, fuel pressure regulator, etc. I have a 89 corvette. Any idea? Sounds like you may have a vacuum leak or bad idle air control IAC valve. My ef falcon temperature gauge will go all the way to the hot level then go back down whilst driving.

Also can be difficult to start like its flooded. Check your coolant level when the car is cold. If the car is overheating, I would do a leak down test to see if you have a failed head gasket.

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An Engine That Sounds Rough If your vehicle has a bad oxygen sensor, it could run irregularly or sound rough when it idles. An Emissions Test Failure Most emissions test failures are from a bad oxygen sensor.