A part that works with the catalytic converter, and often shows up as a catalytic converter failure on code readers, is the oxygen sensor. The oxygen sensor, also known as the O2 sensor, measures the amount of unburnt oxygen in your exhaust system. A failing sensor can cause the check engine light to be triggered, though you can continue to drive relatively fine with it.
Over time it will cause more fuel consumption and damage to the catalytic converter, however, and so re recommend replacing it as soon as possible. It costs about $175 for a quality O2 sensor, but labor prices will vary greatly depending on vehicle type.
2. Loose or Damaged gas Cap
Yes, you read that correctly. A loose or damaged gas cap can be one of the most common reasons why the check engine light turns on. This often shocks some younger drivers, particularly those that aren’t very mechanically inclined, but there is a good reason for this. The gas cap plays a very important role in your fuel delivery system. It prevents gasoline from leaving the fuel tank and keeps the system under the right pressure to ensure optimal performance. This is a very cheap and easy part to replace as it’s about $15 for a new cap at your local auto parts store.
3. Bad Spark Plug Wires
The spark plug wires transfer electricity from the coil to the spark plug. Without them, the fuel and air in your engine’s cylinders wouldn’t ignite and you wouldn’t have a functioning engine. Symptoms of bad spark plug wires are often a rough idle, poor engine performance, lower fuel economy, etc. Thankfully, these wires aren’t too expensive to replace as they are about $50 for a new set.
Read More: 2020 Lexus LS Luxury and Comfort FeaturesThese are just some of the most common, and least expensive, causes of a check engine light coming on. There are a variety of reasons this alert might appear on your dash and so we recommend taking your vehicle to a trusted mechanic, like the ones at our service center, for the best results. Contact our dealership today to schedule routine maintenance or to have an inspection done!
If the gas cap is loose, broken or otherwise ill-fitting it could allow fuel to evaporate out of the filler hose. This would be detected by the EVAP system, which then illuminates the check engine light. Be sure to always tighten your gas cap after a fill up.
Oxygen Sensor
The oxygen sensor is located in the exhaust system and helps calculate the proper air to fuel ratio. If the sensor malfunctions it could result in excessive amounts of gasoline being burnt, thus decreasing your fuel efficiency. This could also happen if there is an exhaust leak.
MAF Sensor
The mass air flow sensor measures the volume of incoming air to help ensure a proper air/fuel mixture in the combustion chamber. If it fails it can cause the car to run rich, meaning it will use excessive amounts of gas, thus triggering the light.
Catalytic Converter
If either of the two problems above are not with it could lead to damage of the catalytic converter, which is an expensive fix, especially compared to the minor cost of a new O2 or MAF sensor. The catalytic converter converts hazardous exhaust fumes to less harmful emissions and burning excessive gas can result in damage to this critical part.
An exhaust leak is a serious problem. It's bad for the environment. It's bad for your car (especially the engine). And, it can be really bad for the health of anyone in or around your car. At the first sign of an exhaust leak, you should take your vehicle to an auto repair specialist like San Francisco Automotive Solutions for a proper diagnosis and expert repairs.
From the exhaust manifold and catalytic converter to the muffler and all connecting exhaust pipes, a leak can happen anywhere along the way when a part becomes damaged, weakened or rusted—or if there is a loose connection between components.
There are a few telltale signs of an exhaust leak (or other exhaust problems) that will let you know it's time to get the vehicle checked out by a professional. Here's what you can look for:
Strong Exhaust Smells
If you notice the smell of exhaust being much more prominent than usual, then you might have an exhaust leak. Breathing in these fumes filled with carbon monoxide can be deadly, so you do not want to waste any time in getting the vehicle's exhaust system inspected.
Rattling or Vibrating
Another common sign of an exhaust problem is a distinct rattling noise or excessive vibration. This is usually caused by a failing catalytic converter.
Hissing or Popping
Unusual sounds you might notice include a loud hissing noise or "pops" when you accelerate the car. These are commonly associated with exhaust leaks and other exhaust system problems.
Check Engine Light
If your check engine light comes on, it can mean any number of things. However, the exhaust system (often the catalytic converter or a failing oxygen sensor) is one of the most common culprits.
Loss of Gas Mileage
Another sign of exhaust issues is when the car experiences a significant loss in gas mileage. There can be multiple causes for this, but the exhaust system will definitely be a prime suspect.
If you notice any of these signs (or more than one), then don't wait to bring your vehicle into San Francisco Automotive Solutions for a thorough inspection and quality repairs backed by warranty. Whether it's an exhaust leak or some other exhaust problem, you do not want to take any chances that it will lead to major internal engine damage or affect your health.
Call San Francisco Automotive Solutions today at (415) 957-1170 or book your service appointment online.