The O2 sensor is vital for your car to run smoothly in all conditions. Even though an O2 Sensor is not considered a regular maintenance item, the sensors operation may deteriorate after , miles due to the harsh conditions of exhaust heat and gases. Replacement of the sensors may bring better MPG and performance to your car! The Take 5 Oil Change. We have tons of articles to read, all lovingly crafted by CarAdvise for you!
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Now start the car and let it run until it reaches operating temperature. This may take up to 20 minutes. Once you have reached operating temperature, turn off the engine. Please use caution when connecting the probes as the engine and exhaust system will be extremely hot. If it is within this range, the o2 sensor is operating normally and you can stop testing.
In case it is not within range, there is either an engine problem loose hose or the o2 sensor is bad. If it appears to be bad, continue with the next steps. Test the o2 sensor response to a lean fuel consumption situation.
Disconnect the hose from the positive crankcase ventilation PVC valve which is located on the valve cover. This will allow more air into the engine so the voltmeter should read close to mV 0. If the voltmeter does not respond, the o2 sensor is not functioning properly. To do this disconnect the plastic hose connection to the air cleaner assembly.
If there is less oxygen, the engine is running rich. Conversely, if there is more oxygen, the engine is running lean. Most late-model vehicles are equipped with a heat source to warm the sensor for a more accurate voltage signal immediately.
This allows the system to go into a closed loop for faster feedback, so the fuel mixture is balanced sooner to reduce unwanted emissions. As contaminants accumulate on the sensor tip, the ability to produce a signal voltage is reduced and the performance of the O2 sensor diminishes.
Fuel consumption and emissions into the environment go up with the O2 sensor's slower response.
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