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Nissan Titan Oxygen Sensor

Symptoms of a Bad Nissan Titan Oxygen Sensor

The Nissan Titan oxygen sensor primarily measures the air/fuel ratio in your combustion system. Your truck has two sensors, and the first one is found in front of the catalytic converter and serves the main function. After it measures the air/fuel ratio, it sends a signal to the computer, which uses this information to try and get the needed mixture. The other oxygen sensor, meanwhile, is found behind the catalytic converter. Aside from measuring the air/fuel ratio, it also checks if the catalytic converter is working. If either of these oxygen sensors turn faulty, then your truck's engine will start to go bad. So if you experience any of the following symptoms, then it's time to take a look at the oxygen sensor.

Rough engine idle

If your truck has a bad oxygen sensor, its engine will often run irregularly. This component contributes to the engine's different functions, including fuel mixture, timing, and combustion intervals. If the oxygen sensor turns faulty, then these functions can get disrupted and cause a rough engine idle. If you are experiencing this, run some function tests to diagnose the component.

Engine misfire

If a bad oxygen sensor causes an engine's air/fuel ratio to become too lean or restricted, then the explosions within the combustion system will be altered. Normally, a mixture that has too much air and not enough fuel will cause the engine to misfire. This condition is normally experienced during idle or at lower speeds.

On the other hand, if the air/fuel ratio is too rich in all of the engine's cylinders, then the oxygen sensor might already be dead. If this component has stopped working entirely, this could prevent the computer from going into closed loop and allow the ratio to lose its balance.

Engine pinging

If a bad oxygen sensor is aligned with the ignition system, it can either slow down or speed up the ignition timing, which can cause the engine to ping. This sound occurs when the engine's combustion gases are ignited at the wrong times.

Poor gas mileage

Depending on which oxygen sensor is faulty, the fuel delivery and the fuel combustion systems can be thrown off or made irregular by a bad sensor. If too much fuel is injected into the combustion system or the faulty part disturbs the delicate air/fuel mixture of your truck's engine, then gas mileage will suffer.

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  • Top Maintenance Tips for the Nissan Titan Oxygen Sensor 27 February 2013

    Feeding data to the engine management computer, the Nissan Titan oxygen sensor is there to help the engine run efficiently and produce low emissions. It is positioned in the exhaust pipe so that it can detect rich and lean mixtures and send the gathered information to the computer. Because of its importance, you have to know how to take care of your oxygen sensor. Without it, all the systems that depend on it are bound to fail.


    Run a diagnostic test.

    You can request for a free diagnostic test from your nearest auto shop to find out if an oxygen sensor has been causing problems. After running the test, determine where it is located by asking the shop's technician or referring to your owner's manual.


    Clean the oxygen sensor.

    When cleaning the component, you must first remove it from where it is mounted. Again, look at your owner's manual to find the location of the oxygen sensor. Once you have taken it out, spray compressed air all over the component to remove dusty particles that haven't stuck to it yet. Then, scrub its surface using a wire brush to remove any excess grit and grime. When you have removed all the dirt, wipe the oxygen sensor with a clean rag. Once you're done, reinstall it carefully and make sure that all of its connections are tightly and correctly attached.


    Replace the oxygen sensor.

    The top preventive maintenance for your oxygen sensor is to replace it every 100,000 miles. No matter how often or how thoroughly you clean it, contaminants such as oil, water, and dirt will always get to the component and cause it to become sluggish. Replacing it as scheduled is also the best way to prolong the life of your truck's catalytic converter.


    Other maintenance tips

    If you are experiencing issues such as increased fuel consumption, engine hesitation or surging, or activated "Check Engine" light, then it might be time to replace your oxygen sensor.


    Even if you only have to replace the component every 100,000 miles, you still have to keep an eye on it often as failure of the oxygen sensor could lead to expensive consequences. This includes the possibility of your catalytic converter going bad.