How long does it take for a Subaru check engine light to reset?
The check engine light on your Subaru can be a source of stress, but understanding how it works and how long it takes to reset can help ease your concerns. Whether the light is triggered by a minor issue or something more serious, knowing the reset process is essential for maintaining your vehicle's health and performance.
What Causes the Check Engine Light to Turn On?
The check engine light is part of your Subaru's onboard diagnostics system (OBD-II). It illuminates when the system detects an issue with the engine, emissions, or other critical components. Common causes include:
- A loose or faulty gas cap
- Oxygen sensor failure
- Faulty spark plugs or ignition coils
- Issues with the catalytic converter
- Mass airflow sensor problems
Once the underlying issue is resolved, the light should reset itself, but the time it takes can vary depending on the situation.
How Long Does It Take for the Light to Reset?
In most cases, the check engine light on a Subaru will reset automatically after the issue has been fixed and the car has been driven for a certain number of cycles. A "cycle" typically involves starting the car, driving it until it reaches operating temperature, and then turning it off. Here’s what you can expect:
- Immediate Reset: If the issue was minor, such as a loose gas cap, the light may turn off almost immediately after tightening the cap and driving for a short distance.
- Several Drive Cycles: For more complex issues, the light may take 3-5 drive cycles to reset. This allows the OBD-II system to verify that the problem has been resolved.
- Manual Reset: In some cases, the light may not reset on its own. You may need to use an OBD-II scanner to clear the code manually or visit a professional mechanic for assistance.
What If the Light Stays On?
If the check engine light remains on after addressing the issue, it could indicate one of the following:
- The problem hasn’t been fully resolved.
- There is a new, unrelated issue triggering the light.
- The OBD-II system needs to be manually reset.
In such cases, it’s best to consult a trusted mechanic to diagnose and resolve the issue. At Kevin's Autos, we specialize in computer diagnostics and can help ensure your Subaru is running smoothly.
Tips for Preventing Check Engine Light Issues
To minimize the chances of your check engine light turning on, follow these tips:
- Regularly inspect and tighten your gas cap.
- Keep up with routine maintenance, such as oil changes and spark plug replacements.
- Address minor issues promptly to prevent them from escalating.
- Use high-quality fuel and follow your vehicle’s recommended maintenance schedule.
Conclusion
The time it takes for a Subaru check engine light to reset depends on the nature of the issue and how it’s resolved. While minor problems may result in an immediate reset, more complex issues could take several drive cycles. If the light persists, don’t hesitate to seek professional help. At Kevin's Autos, we’re here to provide expert diagnostics and repairs to keep your Subaru in top condition.
Frequently Asked Questions
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 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.
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.
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.
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.
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.
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 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.
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.
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.
