Skip to content
Picture yourself behind the wheel when all of a sudden the check engine light pops up on your dashboard out of nowhere!
This signal could indicate anything, from a problem like a gas cap to a potentially critical issue that demands prompt action.
Before you make any decisions or head to the auto shop for repairs though; there are ways you can reset the light by yourself either manually or, with the help of a car reader.
In this manual we will explore a variety of methods.
Beginning with steps that do not necessitate expertise and concluding with a technique that does involve it.
This guide offers straightforward approaches to guaranteeing the operation of your vehicles diagnostic system.
Why has the Check Engine Light illuminated
The indicator light, for the engine is a feature of your cars system (OBD II) which consistently checks different parts of the vehicle.
If it notices a problem with the engine or emissions system or any other essential components it activates the indicator light to alert you.
The causes, for this light turning on can range from solutions to intricate issues.
One of the reasons, for the check engine light to come on is an damaged gas cap as it can interfere with the pressure, in your fuel system and activate the light indicator; tightening or checking the gas cap typically resolves this problem effectively.
A faulty oxygen sensor is responsible, for keeping track of the amount of oxygen in the exhaust of your vehicle.
If it stops working it can make the engine run efficiently and result in increased emissions.
A faulty catalytic converter can lead to a decrease, in your cars fuel efficiency and performance since it is responsible for minimizing emissions, from the vehicle.
When the Mass Airflow Sensor (MAFS) malfunctions; The sensor gauges the air volume going into the engine and assists, in adjusting the air fuel mixture ratio an impaired MAF sensor can result in engine operation.
Issues, with Spark Plugs or Ignition Coils; When spark plugs or ignition coils are worn out or damaged it can cause engine misfires that might activate the check engine light.
When it comes to car problems, like a gas cap that you can easily resolve yourself and others that might need help to ensure your vehicle stays safe and running efficiently.
It's important to figure out the issue first before you reset the check engine light to prevent any additional harm from occurring.
Related Reading: Why You Should Consider Getting the Ancel Ad410
Disconnect the Battery
Step 1. Start by disconnecting the battery.
Step 2. Make sure the battery is isolated from any power source.
Step 3. Wait for a minutes before proceeding with any actions, on the device.
A straightforward and frequently used method to turn off the check engine light is to disconnect the car battery.
By doing this action you interrupt the power supply to the cars built in computer system which erases any stored diagnostic trouble codes (referred to as DTCs).
Please switch off the car. Pop open the bonnet to reach the battery.
Locate the terminal (indicated by a sign or a black cover) and then use a wrench to detach the negative cable carefully to avoid any electrical problems or sparks as disconnecting the positive terminal first could lead to issues.
Give it 15 minutes of waiting time for the vehicles electrical system to reset and clear out the trouble codes that caused the check engine light to come on.
After you've waited for a bit of time to pass by reconnecting the battery terminal and ensuring its properly tightened up.
After reconnecting the battery in your car and then starting it up again should turn off the check engine light if the problem has been fixed; however keep in mind this action will also reset settings, like radio presets and clock settings, in the cars system too!
It's an efficient way to get rid of the light momentarily but just remember this doesn't fix the root cause—it just resets things temporarily.
Operating the vehicle for cycles
If the warning light, in your car turns on due to a problem, like a gas cap or a temporary sensor error the system that checks for issues may fix itself after you drive a few times.
Begin by starting your car and driving for around 20 to 30 minutes making sure the engine warms up to its operating temperature during the journey.
You'll want to head out on a highway or open road, for this drive as it gives the engine the chance to run at its performance level.
After you finish driving the car switch off the engine. Allow it to cool down completely for a hours.
This cooling period is crucial for the system to complete its cycle registration accurately.
Repeat this procedure across driving cycles – around three to five times. As it may require, up to 10 cycles for the system to automatically reset the check engine indicator light.
This approach doesn't need any equipment which makes it a handy choice to consider for sure!
Nevertheless it depends on the cars system identifying that the problem is fixed properly.
If the light stays on after a rounds of testing it out it could mean there's a lingering problem that requires additional focus and care from your end.
ANCEL AD410 OBD2 Scanner Professional Diagnostic Scanner $49.99
ANCEL AD310 Engine Code Reader ODB2 Car Diagnostic Scanner Turn off Engine Check $39.99
Use a Car Code Reader
To take a methodical approach, to this situation it is highly suggested to utilize a code scanner tool.
This tool doesn't just clear the indicator for the engine check. Also offers information regarding the root of the problem by scanning the diagnostic trouble codes ( DTC s ).
Find the OBD II port in your car. You'll usually spot it under the dashboard close, to the steering column.
Connect the code reader to the car. Switch the ignition to the "On" position without starting the engine enabling the code reader to communicate with the cars computer system.
When you check the code reader it will show any stored diagnostic trouble codes (also known as DTC).
These codes help pinpoint the reason, behind the check engine light coming on directly so be sure to jot them down before you move on to resetting it.
After checking the codes and reviewing them for accuracy simply follow the steps indicated by the code reader to eliminate or erase the codes.
This action will result in the deactivation of the check engine light.
Once you've finished inputting the codes into the system. Ensuring everything is set up correctly you can disconnect the reader before starting the vehicle.
The best way to reset the check engine light effectively and, with confidence is to utilize a code reader as it allows for the identification of any underlying issues, before initiating the reset process itself.
If the light reappears post reset using the code reader method additional diagnostics are necessary to pinpoint and resolve the underlying problem.
Where to Get a Code Reader
If you're in the market for a reliable car code reader, the ANCEL brand is highly recommended by both professional mechanics and DIY car enthusiasts.
ANCEL offers a wide range of scanners suitable for different needs. Models like the ANCEL AD410 and ANCEL AD310 are popular choices for their affordability and ease of use.
If you're looking for something with more advanced features, the ANCEL X7 and ANCEL V6 Pro provide comprehensive diagnostics and are ideal for those who need a more complete scan of their vehicle's systems.
Investing in a quality car scanner ensures that you’re not just resetting the check engine light, but also addressing any underlying issues accurately. Check ANCEL now!
FAQs
Can a code reader harm my vehicle if used incorrectly?
No, a car code reader is designed to read and clear diagnostic codes, and as long as it’s used correctly, it will not harm your vehicle. However, it’s important to only clear the codes after addressing the root problem. Resetting the check engine light without fixing the issue could lead to further complications.
Are car code readers compatible with all vehicles?
Most modern code readers are OBD-II compliant, meaning they work with all vehicles manufactured from 1996 onward. However, if you own a vehicle made before 1996 or a specialized vehicle, like a commercial truck, you may need a more specialized diagnostic tool.
Can a car code reader detect pending issues before the check engine light comes on?
Yes, some advanced car code readers can detect pending trouble codes, which are early signs of potential problems that have not yet triggered the check engine light. This feature can be very useful for proactive maintenance and preventing bigger issues down the road.
Recommended Similar Articles：
- Your Ultimate Guide to Using an OBD2 Scanner with Bluetooth
- How the Ancel VD700 OBD2 Bluetooth Scanner Can Help You Keep Your Car Running Smoothly
- Maximize Your BMW Potential with the Ancel BM700 OBD Scanner
- Ancel AD310 | The Best and Most Affordable OBD2 Scanner
- Revolutionize Your Car Maintenance with the Ancel X7 OBD2 Scanner with Bluetooth
