How Do You Reset Mazda Check Engine Light?

The Mazda check engine light lets drivers know there is a problem when a part of their car isn’t working right and they need to look into it more.

If your light comes on while you’re driving around Sarasota or Tampa, don’t wait! Make an appointment at the nearest authorised Mazda dealer right away.

If the engine light on your Mazda3 comes on, calling our service centre or making an appointment for service can help keep your engine from getting damaged over time.

Even though it’s not always clear what the Mazda engine light is telling you, it’s a useful tool. You shouldn’t ignore the Mazda engine light for too long, but here are some ideas of what it could mean.

Let’s say it’s a beautiful sunny day and you’re driving down the road when you notice your check engine light is on. Should I have a panic attack?

Should you pull over right away and have your car towed in? Well, it depends, but it’s probably not a big deal. The Check Engine Light is your car’s way of telling you “something is wrong.”

What’s Wrong With My Check Engine Light

check engine light on

There are a few things that could cause the check engine light on your Mazda3 to come on. At first, it can be scary to see, especially if you are on a highway in Farmington. When this light comes on, you’ll want to find out which parts of your Mazda might be having trouble. If the Mazda check engine light is on, it could be because of any of the following:

  • There is a problem with the electrical system of the engine.
  • There is something wrong with the system that controls emissions.
  • The gas tank is empty or almost empty.
  • The gas cap is either missing or isn’t on tight enough.
  • A mechanic with a clipboard stands in front of an open-topped car.


Don’t worry. Most likely, your car is safe. So, here are some things you can do to keep yourself, your passengers, and your car safe until you can get it checked out:

  • If the light keeps flashing or stays on for a long time, you shouldn’t drive fast. These signs mean that you should go to the service department of an authorised Mazda dealer as soon as possible.
  • If your car’s check engine light is on, you can turn it off by taking out the battery and putting it back in.
  • But the technicians at University Mazda don’t think this is a good solution for people in Farmington because it could hide old problems or cause new ones.

Why Is My Check Engine Light Flashing?

If your check engine light is flashing, it could mean a few different things, depending on the make. Some manufacturers’ lights blink, while others stay steady. If the check engine light only blinks when you start your car, this is usually fine. Most of the lights on your dashboard should turn on and/or blink in the first few seconds after you start your car. A problem that comes and goes could also cause the check engine light to flash.

In short, if the check engine light on your Mazda3 flashes or blinks, you should take it just as seriously as if it was on.

How Do I Fix The Check Engine Light 

The gas cap not being tight enough is one of the most common reasons why the check engine light comes on, so that’s the first thing you should check. The on-off method is another choice. This method makes the computer reload its saved state when it starts up again. How to do this:

  • Put your key in the car’s starter.
  • For one to two seconds, turn it on.
  • Turn it off for a second or two.
  • This step should be done three or four times.

If you’re a good do-it-yourself handyman, you might be able to fix some of the other problems (hopefully with original parts). If not, it’s best to take it to a professional near Edwardsville who can read the system code and figure out what the problem might be.

How To Read Your Check Engine Light

So, skip the middle man and the hassle by using our fix finder service to do the diagnostic test yourself. Get a hold of an OBD (Onboard Diagnostics) reader to find out what’s going on. It’s simple, free, and doesn’t take long. This is how.

Stop by to check out the OBD reader.

Ask a Mazda Professional to borrow an OBD reader when you stop by. We can also answer any reader-related questions you may have. Make safety the most important thing. Before you start the diagnostic read, you should park the car and turn it off.

Find the port for the OBD

The OBD reader is usually near the steering wheel, and it has a 16-pin connector. But few cars will have the port in the middle or on the passenger side, so check the user manual for your car for more information.

Start the car, but don’t turn on the engine.

Make sure the car is on but the engine is not running before you plug in the reader. If your car doesn’t have a key, press the start button twice without pressing the brake.

Bring the Reader in

Let the car run for 5 seconds, then plug the OBD reader into the connector. Make sure the reader fits well so it can talk to the car’s computer.

Automatically, the reader will scan.

The reader should automatically connect to the car’s computer, and the word “read” will show up on the reader’s screen. The scan will take about 5 seconds, and when it’s done, the screen will say “done.” When the scan is done, you should unplug the reader and turn off the car.

Note the details of the car

The year, make, model, and mileage of the car are all important for the scan. For the diagnostic report, you will need this information.

Some of the most common problems with the Check Engine Light are

The electronics in your car will constantly change and fine-tune different settings based on how you drive to get the best performance and fuel economy.

When the computer sees that any of these parameters are outside of the acceptable range for running the car, it will store a “code” and turn on the Check Engine Light to let you know there may be a problem.

If the Check Engine Light comes on, you should take your car to a certified mechanic who can look for problems and fix your car so that it works the way the manufacturer intended.

But just because that light is on doesn’t mean that your car needs expensive repairs. Sometimes it’s just a “glitch in the system,” which can be caused by sudden weather changes or a bad tank of fuel.

For example, if you just got a new battery, your car may set some random codes as it relearns how everything works. Even if it seems small, you should always get it checked out.

loose Fuel cap

Even if you don’t believe it, your Check Engine Light can be turned on by a loose gas cap. This is because modern fuel injection systems are based on a pressurised, sealed system with evaporative control to reduce emissions. If the gas cap is loose, this system can lose pressure, which will hurt the way your car runs.

oxygen O2 sensor Needs Replacement

Your oxygen sensor checks how much oxygen and unburned fuel are in the exhaust gases. With these measurements, the computer can change how much fuel and air it lets into the engine. This is a very important performance indicator, and a bad O2 sensor can hurt performance. If you don’t get this fixed, your engine will use more fuel than it needs to, your gas mileage will go down, and your spark plugs and catalytic converter could be damaged by faulty O2 sensors.

Bad chemical converter

Your car’s catalytic converter turns harmful carbon monoxide into less harmful carbon dioxide. This helps protect the environment and cut down on smog. Most damage happens because other parts of the engine haven’t been taken care of. If you don’t replace your catalytic converter, your car won’t pass an emissions test, it will run much less well and use a lot more gas, and it may run hotter.

When a catalytic converter isn’t working right, it runs at a very high temperature. This makes the chance of a fire much higher.

Errors with The Mas airflow sensor 

The mass airflow sensor measures how much air is going into your engine so you can figure out how much fuel you need for it to run well. If the mass airflow sensor is dirty or broken, the engine may have a rough idle or not work well. Spark plugs, O2 sensors, and catalytic converters can all be damaged by sensors that aren’t working right. If you don’t fix this, the car won’t idle well, won’t run well, and will use a lot of gas.

Replace Spark Plugs 

Your car’s spark plugs light the mixture of air and fuel in the combustion chamber. The ignition coil sends the spark to the spark plugs through the spark plug wires. If something goes wrong with this system, your car won’t run as well as it should, and too much unburned fuel could leak out of your exhaust. This can make your catalytic converter clog up or hurt your O2 sensors and other parts of your ignition system.

Why Should You Go To a Dealership to Fix The Check Engine Light?

Check Engine Light codes can be read at almost any auto parts store or corner repair shop. There are also readers that you can buy at a number of stores and online. But those readers only tell you what code was set in the computer. They don’t always give you a good idea of what might be wrong.

Visit the Neil Huffman Mazda Service Department for more detailed diagnostics or repairs that are covered by your Mazda warranty. We have technicians who have been trained by Mazda and diagnostic equipment that has been approved by Mazda, so we can give you the best and most up-to-date repair information.

Neil Huffman Mazda also sells the same parts that were used to build your car, so you can be sure that it will run like new when you take it home after repairs.

Back to top button