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When that dreaded check engine light comes on, you maybe confused and worried about it.Please noted that it's not ok to drive on the road when the check engine light is on.
How to reset the check engine light? CGSULIT is here to tell you the steps to turn off the engine light on your car with our OBD2 code reader. You might be able to solve the problem yourself. At the same time, you can avoid going to make an appointment at the mechanics, driving there, losing time, etc.
This article will hopefully show you that the whole process is easy and no more complicated than using a smartphone.
Choosing the Right OBD2 Scanner to Reset Your Check Engine Light
Before you reset the check engine light, it’s important to choose the right OBD2 scanner for your needs. Not all scanners are built the same, and the best option really depends on what you expect from the tool.
If your only goal is to clear the check engine light and read basic engine trouble codes, a simple OBD2 code reader will be more than enough. These entry-level scanners are designed specifically for engine diagnostics and usually cost between $15–$50, making them an affordable solution for most DIY car owners.
On the other hand, if you want more than just turning off the check engine light—such as accessing live data streams, performing advanced reset functions, or working on multiple vehicle systems—then you’ll need a professional-grade OBD2 scanner. These typically cost $100 or more and come with enhanced capabilities like ABS bleeding, crankshaft position relearn, transmission temperature monitoring, and other advanced diagnostic features.
By understanding your needs first, you can avoid overspending while still ensuring you have the right tool to keep your vehicle in top shape.
How to reset the check engine light with a code reader?
Take CGSULIT SC301, a professional check engine light reader, as the exmple to turn off the check engine light.
1. Locate the OBDII Port
2. Connect the OBD2 Code Reader
3. Turn On the Ignition
4.Let the OBD2 Code Reader Perform a Scan
5.Read and Interpret the Error Code
Once the scan is finished, you’ll get a list of error codes. There might be one or more.
After this, you must look up what the error codes mean and properly interpret them.
This is a very important step and a crossroad for further action because it informs you about the seriousness of the problem.
We recommend that you first read the fault codes to understand why the check engine light is on. After fixing the issue according to the code, you can then use the scanner to turn off the check engine light.
For easier code interpretation, most OBD tools have a mini code library installed so you can look it up on the spot. The other option is of course the internet.
6.Go Through the Menu and Select to Clear the Check Engine Light
If you think the error code is not dangerous and worth clearing, then visit the Tools menu again and select the option to clear the error code.
Most tools have the same basic menu, so finding the exact command is more or less the same.
After selecting the correct command, press the confirm button. You may get a question if you want to clear the error code, select Yes.
7.Return to the Homepage
Use the escape or return button and go back to the beginning menu (the one which shows up when the reader first powers up).
8.Disconnect the OBD Code Reader
Pull out the connector from the OBD port. Again, be careful not to damage it.
When the OBD reader has an on/off button, first turn it off and then disconnect it.
9.Turn Off the Ignition
Turn the ignition key back into the first position or as backward as it goes.
10.Start the Engine and Check If the Light is Gone
If everything is OK, the check engine light should go off immediately after starting the engine.
Once the engine gains some temperature, you can start it a few more times to see if the check engine light comes back.
Conclusion
As you see, learning how to use a code reader to clear the check engine light is not difficult at all.In fact, it takes only about five to ten minutes, depending on the OBD2 tool and the user's experience.
Turn off the check engine light yourself with an OBD2 code reader—save time, save money, and enjoy the satisfaction of DIY car repair. Become your own mechanic today!
Although the reset process is simple, I must urge you again to first find out what the error code means and fix the problem, especially if it's serious.
Otherwise, the effect of clearing the code will be temporary and won't solve the actual problem in any way.
Finally, learning to clear a check engine light is more or less necessary if you want to finish some DIY repairs properly. Otherwise, you might end up making a successful repair only to drive around with the dreaded check engine light up all the time.
Frequently Questions & Answers
❓ Can I reset the check engine light without fixing the problem?
👉 You can temporarily clear the light with an OBD2 scanner, but it will likely come back if the underlying issue isn’t fixed. Always diagnose the fault codes first.
❓ How long does it take for the check engine light to reset?
👉 If the issue is resolved, the light may turn off automatically after 30–50 driving cycles. Using an OBD2 scanner, you can reset it instantly.
❓ Will disconnecting the battery reset the check engine light?
👉 Yes, disconnecting the battery may clear the light, but it also erases important ECU data and is not recommended. An OBD2 scanner is a safer method.
❓ What is the cheapest way to turn off the check engine light?
👉 A basic OBD2 scanner (around $30–$60) lets you read codes, fix issues, and reset the light—saving hundreds in mechanic fees.
❓ Is it safe to drive with the check engine light on?
👉 It depends. If the light is steady, it’s usually safe to drive short distances. If it’s flashing, stop immediately as it could indicate serious engine damage.