What is the check emission system light on a Subaru?
The check engine light, also known as the malfunction indicator light (MIL), is a warning system in Subaru vehicles that alerts the driver to potential issues with the engine or emissions control system. When this light illuminates on the dashboard, it's important to address the underlying problem promptly to avoid further damage or decreased fuel efficiency.
What Does the Check Engine Light Indicate?
The check engine light on a Subaru can be triggered by a variety of issues, including:
- Malfunctioning sensors or components in the engine or emissions control system
- Problems with the fuel system, such as a faulty fuel pump or clogged fuel injectors
- Ignition system issues, such as faulty spark plugs or ignition coils
- Problems with the catalytic converter or other exhaust components
- Loose or damaged gas cap
When the check engine light illuminates, it's important to have the vehicle diagnosed by a qualified mechanic or technician to determine the underlying cause and address the problem.
Diagnosing and Addressing the Check Engine Light
To diagnose the check engine light, a mechanic will typically use an on-board diagnostic (OBD) scanner to read the trouble codes stored in the vehicle's computer. These codes provide information about the specific problem that triggered the light, allowing the mechanic to identify and address the issue. Some common steps in the diagnosis and repair process include:
- Connecting the OBD scanner to the vehicle's diagnostic port to read the trouble codes
- Visually inspecting the engine and emissions control components for any obvious signs of damage or wear
- Performing additional tests, such as checking for vacuum leaks or testing the fuel system
- Replacing any faulty components or making necessary adjustments to resolve the underlying problem
- Clearing the trouble codes and verifying that the check engine light has turned off
It's important to address the check engine light promptly, as ignoring the problem can lead to further damage and decreased fuel efficiency. By working with a qualified mechanic and addressing the underlying issue, Subaru owners can ensure their vehicle's performance and emissions control system are functioning properly.
