All cars today contain at least one computer. Computers are responsible for reading information from sensors in major systems, including air and engine temperature sensors, oxygen sensors, throttle position sensors, and air pressure sensors, among others. With this information, the computer can properly control mechanisms, including spark plugs, fuel injectors, and engine performance for low emissions.

When the computer recognizes there is an issue within the vehicle, it turns on the check engine light as a warning. If your vehicle’s computer displays a check engine light, bring it to Harrell’s Tire & Auto Service. We use the same diagnostic equipment to communicate with the vehicle’s computer as the manufacturers do. A check engine light could indicate many different issues. It is vital to have the right equipment to read exactly where the problem is, allowing for a detailed inspection and quick repair.