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Chevrolet Avalanche Oxygen Sensor

Detecting Chevrolet Avalanche Oxygen Sensor Problems

Being rich doesn't always mean good news. In fact, it spells death for your vehicle. An engine that's running rich can cause performance problems, poor fuel economy, and decreased acceleration power. Fortunately, you can always count on your Chevrolet Avalanche oxygen sensor to help save your vehicle from such problems. The O2 sensor monitors and measures the oxygen content in exhaust gases so that your engine will run on optimum and accurate air/fuel mixture. The measurement from the oxygen sensor is then used by the engine's computer to properly adjust the air and fuel mixture in your vehicle. Incorrect adjustment in the mixture often results in poor engine performance and high emissions, so the oxygen sensor must always be in good working condition to ensure precise measurements. Problems with oxygen sensors often crop up after several years of use, but doing some troubleshooting right away can help save the sensor from total failure. Here are some tips to help you find the causes behind oxygen sensor problems:

Rough idling

Although there are several other factors that can cause rough idling, one of the parts that you should check first is your oxygen sensor. Often, the engine runs rough due to an oxygen sensor that's malfunctioning and sending inaccurate measurements to the computer. A faulty sensor can disrupt several engine functions, such as ignition timing and combustion intervals, causing your vehicle to stall and eventually run rough. Unfortunately, your engine can easily detect signs of oxygen sensor malfunction, so it will inject more fuel than necessary to counteract the problem. The extra amount of fuel often results in rough idling. To prevent this problem, have a mechanic check your vehicle's oxygen sensor. Better yet, test the sensor yourself with a 10-megaohm digital voltmeter. A voltage reading that takes around four minutes or more to fluctuate is a sign that the sensor needs replacing.

A sudden increase in vehicle emissions

If you're noticing an increase in your vehicle emissions, then your oxygen sensor has most likely gone faulty. If the sensor's malfunctioning, it won't be able to keep the emissions of your vehicle within the required parameters. Also, a bad sensor will have problems adjusting and measuring several engine operations and ratios. Test the sensor for proper operation and have it replaced if necessary to correct the problem.

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  • Caring for Your Chevrolet Avalanche Oxygen Sensor 27 February 2013

    Poor fuel economy, power loss, slow acceleration, rough idling, and engine misfires-these are just some of the problems a bad oxygen sensor can bring to your vehicle. An O2 sensor is designed to provide accurate air/fuel ratio measurements to the ECU and also keep several engine operations in check. It basically controls, monitors, and adjusts several engine parameters to keep your vehicle running smoothly. Since the oxygen sensor is crucial to your vehicle's health, you must therefore give it proper care and maintenance to prolong its life and ensure good service. Maintaining the sensor will not only help keep engine troubles at bay, but it will also save you from staggering repair and replacement costs. Here are few tips in caring for your Chevrolet Avalanche oxygen sensor:


    Clean the sensor regularly.


    Oil, coolant, and fuel can accumulate inside the sensor over time and reduce its performance, so you need to clean it regularly to avoid engine problems. Cleaning the sensor won't take up much of your time, and it's actually the cheapest way to maintain its performance and prolong its life. To clean the sensor, submerge it in a container filled with a good amount of gasoline and let it sit overnight. This will help remove deposits and dirt buildup from the sensor. Aside from soaking the sensor in gasoline, scrubbing it with a wire brush and spraying it with compressed air can also help eliminate excess grime from its metal end. Do this cleaning process regularly to unclog the sensor and improve its performance.


    Check the sensor harness.


    Aside from regular cleaning, performing routine inspections on the sensor's connector and wiring harness is also an effective way to prevent sensor-related problems. A quick visual inspection will usually reveal signs of damage and defect, such as frayed wires, loose connections, and wiring shorts. Tightening loose connections and replacing damaged wires can help prevent the sensor from malfunctioning. Also, secure the sensor's wiring harness in a safe location, preferably a good distance away from the exhaust to protect the wires from heat and damage.