How do you turn off the check engine light on a 2018 Silverado?
The check engine light on your 2018 Chevrolet Silverado can be a source of frustration, especially if the issue has already been resolved. While this light is an important indicator of potential problems, there are steps you can take to reset it once you're confident the underlying issue has been addressed. In this article, we’ll walk you through the process of turning off the check engine light safely and effectively.
Step 1: Diagnose and Fix the Underlying Issue
Before resetting the check engine light, it’s crucial to identify and resolve the problem that triggered it. The check engine light is part of your Silverado’s onboard diagnostics system (OBD-II) and can indicate a wide range of issues, from a loose gas cap to more serious engine problems. Here’s how to proceed:
- Use an OBD-II scanner to retrieve the diagnostic trouble codes (DTCs) stored in the vehicle’s computer. These codes will help pinpoint the issue.
- Address the problem based on the DTCs. For example, tighten the gas cap if the code indicates a fuel system issue, or replace faulty components as needed.
- If you’re unsure how to interpret the codes or fix the issue, consult a trusted mechanic or auto repair shop.
Step 2: Reset the Check Engine Light Using an OBD-II Scanner
Once the issue has been resolved, you can reset the check engine light using an OBD-II scanner. Follow these steps:
- Locate the OBD-II port under the dashboard on the driver’s side of your Silverado.
- Plug the OBD-II scanner into the port and turn on the ignition (do not start the engine).
- Follow the scanner’s instructions to read and clear the DTCs. Most scanners have a “Clear Codes” or “Erase Codes” option.
- Turn off the ignition, unplug the scanner, and start the engine to ensure the light is off.
Step 3: Disconnect the Battery (Alternative Method)
If you don’t have access to an OBD-II scanner, you can try resetting the check engine light by disconnecting the battery. Here’s how:
- Turn off the ignition and open the hood.
- Use a wrench to disconnect the negative battery cable. Wait for about 15 minutes to allow the vehicle’s computer to reset.
- Reconnect the battery cable and start the engine. The check engine light should be off if the issue has been resolved.
Note: Disconnecting the battery may reset other settings in your vehicle, such as the clock and radio presets.
Step 4: Drive the Vehicle
In some cases, the check engine light may turn off on its own after you’ve fixed the issue. The Silverado’s computer performs self-checks during normal driving, and if it no longer detects the problem, the light will reset automatically. Drive the vehicle for a few days to see if this happens.
When to Seek Professional Help
If the check engine light remains on after attempting these steps, or if it comes back on shortly after resetting, it’s time to seek professional assistance. A qualified mechanic can perform a thorough diagnosis to identify and resolve any lingering issues.
At Kevin’s Autos, we specialize in diagnosing and repairing all makes and models, including the 2018 Chevrolet Silverado. Contact us today for expert assistance and reliable service!
Frequently Asked Questions
Why is my check engine light on if nothing seems wrong?
Yes, a check engine light can come on due to a false alarm. This can happen because of temporary electrical glitches, sensor errors, or even software bugs in the car's computer system.
Can I clear the check engine light myself?
An even simpler way to clear the engine management light is to turn the ignition on and off. This approach achieves the same outcome as the previous step, but without disconnecting the battery. Turn the ignition on and off three times, pausing a second between each cycle. The engine management light should go off.
How to reset check engine light on 2018 Chevy Silverado?
Thankfully, the fix for the Chevy Silverado is pretty simple. So how do you reset the check engine light on your Chevy Silverado? Turn the ignition off and back on three times. That's it.
How to clear check engine light without disconnecting battery?
Expert-Verified Answer
You can reset the check engine light without disconnecting the battery by using an OBD2 scanner or by driving your vehicle for a while. The OBD2 scanner allows you to erase codes or reset it manually, while driving can help the computer system reset the light if no issues are present.
How to clear check engine light code on Chevy?
How to Reset a Check Engine Light
- Park your vehicle and turn it off, then remove the key.
- After popping your hood and locating your battery, loosen the nut on the negative battery terminal (you might need a wrench to loosen it).
- Pull the negative connector away from the battery and let it sit for 30 seconds to a minute.
How do you reset the check engine light with a gas pedal?
Speed up to 55 to 60 mph at 75% throttle by slowly pushing the gas pedal down about three-quarters of the way. Maintain that speed for five minutes. Stop the vehicle and let it idle for 10 seconds. Turn the key off and wait two minutes for the ECM to power down.
How to reset check engine light without disconnecting battery?
Expert-Verified Answer. You can reset the check engine light without disconnecting the battery by using an OBD2 scanner or by driving your vehicle for a while. The OBD2 scanner allows you to erase codes or reset it manually, while driving can help the computer system reset the light if no issues are present.
Is it possible for a check engine light to turn off on its own?
In most cases, successfully repairing the issue that caused your light to come on will cause the check engine light to turn off automatically—but only after 10 to 20 “cycles”. A cycle, in this instance, refers to the process of turning the vehicle on, running it for some time, and turning it off again.
How to reset check engine light 2018 silverado?
Steps to Reset Check Engine Light
- Turn off the ignition and put on safety glasses and gloves.
- Locate the negative terminal on your car battery.
- Loosen the nut on the negative terminal with a wrench and pull the negative connector from the battery.
- Reconnect the negative cable and tighten it with your wrench.
How do I manually turn off the check engine?
Turning the Ignition On and Off
The on-off method is the equivalent fix for a vehicle's check engine light. It forces the computer to refresh its saved state through a reboot. Simply place your key into the ignition and turn it on for 1-2 seconds, then turn it off for 1-2 seconds. Repeat this step three or four times.
