Of course, the average vehicle owner has no clue as to how well his oxygen sensors are working. The only clues may be a loss of fuel economy, or elevated carbon monoxide emissions if a pre-OBD II vehicle fails a tailpipe emissions test. If the voltage output from the sensor is low indicating a false lean condition , the PCM will make the fuel mixture richer to compensate.
This increases fuel consumption and emissions. A bad downstream O2 sensor behind the catalytic converter may prevent the catalyst monitor from running, or even cause a false P catalyst efficiency code to be set. Advertisement Q. At what point does O2 sensor performance start to decline? If a high-mileage engine is using oil due to piston ring, cylinder or valve guide wear, phosphorus from the oil will contaminate the O2 sensors and accelerate the aging process.
The same applies to coolant that may be seeping past a leaky head gasket. In some cars, a change in humidity can cause the check engine light to come on. Knowing why the check engine light is on can give you peace of mind, especially after making the necessary repairs. Sun Devil Auto has 19 locations in the Phoenix Area that provide diagnosis, service, and repairs for all makes and models. Find the store closest to you , make an appointment and let us help you keep your car in peak performance.
Enter your email address and we'll email you a digital version of this coupon that you can present on your mobile device at your Sun Devil Auto Shop. Skip to content. Find a Location Locations. Make An Appointment Appointments. Signs Your Oxygen Sensor Is Faulty You can tell your oxygen sensor is faulty by the following signs: Failure to pass the emissions test A decrease in fuel mileage Check engine light going on Poor performance, rough idling, stalling, etc.
Code checker identifying O2 sensor failure Our mechanics have the specialized equipment to test the oxygen sensor in your vehicle. Guidelines for Replacing the Oxygen Sensor How often the oxygen sensor needs to be replaced will be determined by the age of your vehicle and the type of sensor you have. Email me this coupon. The oxygen sensor of your car measures the amount of oxygen in the exhaust gasses that exit the engine.
A bad or failing oxygen sensor presents a negative impact on engine performance and environmental emission. Luckily, there are early warning signals to let the driver know that the oxygen sensor is failing, which can prevent extensive damage.
Those warning indicators on your dash are not just pretty pictures, but they tell you when something is wrong with your vehicle. Are you filling up your gasoline tank more often than usual? Poor oxygen sensors are one of the most common reasons for failure during an emissions test.
Make sure to have your sensors checked by a mechanic prior to your first test to save you time and money. This smell is from burning sulfur and is a symptom of damage in the emission system or a problem with the catalytic converter. If there is not the right balance, it can damage your catalytic converter in your exhaust system, leading to the rotten egg smell. If you see a Diagnostic Trouble Code related to O2 sensors, such as P or P, the problem may lie in the wires, hoses, meta tabs, engine ground corrosion, oxygen sensor, catalytic converter, or the Engine Control Module.
One of the most common DTC codes that is related would be P It indicates that the Catalytic Converter is not functioning efficiently, so the vehicle is increasing the output of harmful pollutants. For an idea of how to troubleshoot P, check out the video below:.
P - System Too Lean Bank 1. Replacing the O2 sensor is not as complex as you think, but monitoring the vehicle and know when to do it is not as simple.
0コメント