How long does it take for a Subaru check engine light to reset?
The Subaru check engine light, also known as the malfunction indicator light (MIL), typically takes between 20-40 driving cycles to reset after the underlying issue has been resolved. This means it can take several days or weeks of normal driving for the light to turn off, depending on your driving habits.
Understanding the Subaru Check Engine Light
The check engine light in a Subaru vehicle is designed to illuminate when the on-board diagnostic (OBD) system detects a problem with the vehicle's emissions control system or other critical components. This light is an important warning sign that something needs to be addressed, and it's crucial to have the issue diagnosed and repaired as soon as possible.
How Long Does It Take for the Light to Reset?
After the underlying problem has been fixed, the check engine light will not immediately turn off. Instead, the vehicle's computer needs to run a series of self-tests, known as drive cycles, to verify that the issue has been resolved. These drive cycles typically take between 20-40 trips, or a distance of 50-100 miles, for the light to reset and turn off.
The exact number of drive cycles required can vary depending on the specific issue, the vehicle's age and mileage, and your driving habits. Factors that can affect the reset time include:
- Driving Conditions: More aggressive or stop-and-go driving can require more drive cycles to reset the light, while highway driving at a consistent speed may reset the light faster.
- Vehicle Age and Mileage: Older vehicles or those with higher mileage may take longer to reset the light, as the computer system may be more sensitive to changes.
- Type of Issue: Some problems, such as a loose gas cap or a minor sensor issue, may reset more quickly than more complex problems like a faulty catalytic converter.
It's important to note that the check engine light may also come back on if the underlying issue is not fully resolved or if a new problem arises. In these cases, the light will need to go through the reset process again.
Resetting the Check Engine Light Manually
In some cases, you may be able to reset the check engine light manually by disconnecting the vehicle's battery for a few minutes. This can help clear the computer's memory and force the system to run a new set of self-tests. However, this method should only be used as a temporary solution, as it does not address the underlying problem that caused the light to illuminate in the first place.
If the check engine light remains on or continues to come back on after being reset, it's best to have the vehicle diagnosed by a professional mechanic to identify and address the root cause of the issue.
How long does it take for a check engine light to clear itself?
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 many miles do you have to drive to clear a check engine light?
30 to 100 miles
To make sure the check engine light does not reappear, it's recommended that you drive your car 30 to 100 miles. This enables the vehicle's “Drive Cycle” to reset, as the various sensors need time to recalibrate.
What causes a Subaru check engine light to come on?
Subaru Check Engine Light Flashing
Other common reasons for a Check Engine Light are damaged oxygen sensor, faulty head gasket, a malfunction with the fuel injection system, dirty mass airflow sensor, faulty emissions control part, or defective spark plugs to name a few.
Will the Subaru check engine light reset itself?
Will the check engine light reset itself? The check engine light on your Subaru will normally shut itself off if the issue or code that caused it to turn on is fixed. For example, if the cause of your check engine light coming on was a loose gas cap, if it's tightened, the light will swiftly turn itself off.
Can I reset the check engine light myself?
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.
How to clear a Subaru check engine light?
Most Common Reason Your Check Engine Light is On
To fix it, remove the gas cap and then put it back on, tightening it until it clicks. It may take a few drives before your Subaru recognizes the fix and the check engine light turns off.
How long does it take for a Subaru computer to reset?
To reset your car's computer, you should disconnect the battery and allow time for the residual energy in the electrical circuits to dissipate completely. Typically, this process can take anywhere from 15 minutes to an hour.
How long does it take to drive to clear engine codes?
30 to 100 miles
To make sure the check engine light does not reappear, it's recommended that you drive your car 30 to 100 miles. This enables the vehicle's “Drive Cycle” to reset, as the various sensors need time to recalibrate.
What makes a check engine light go off by itself?
The check engine light may turn off on its own under specific circumstances. For instance, if the issue that triggered the warning was a temporary glitch or a minor concern, and the subsequent engine cycles confirm that the problem no longer exists, the light may extinguish on its own.
Can I drive my Subaru with the check engine light on?
If your check engine light is flashing in your Subaru, we highly recommend not to drive the vehicle and schedule Subaru service today. Below is a list of the most common reasons your check engine light can come on: New Spark Plugs or Plug Wires are needed for your Subaru.
