Seeing the check engine light illuminate on your dashboard can be unsettling, especially if your vehicle seems to be running normally. This warning light is part of your car’s onboard diagnostic system and is designed to alert you when something isn’t functioning as it should. While some issues are minor, others can lead to worsening engine problems if ignored. At Freeport Automotive, we provide expert check engine light diagnostics and repair in the greater Sacramento area. Here are four common check engine light triggers that should be addressed ASAP.

Failing Oxygen Sensor

The oxygen sensor measures the amount of unburned oxygen in the exhaust and helps regulate the air-fuel mixture. When this sensor fails, the engine may run less efficiently, leading to reduced fuel-economy and increased emissions. Ignoring a faulty oxygen sensor can cause additional strain on the catalytic converter, resulting in more expensive repairs.

Malfunctioning Mass Airflow Sensor

A mass airflow sensor monitors how much air enters the engine and helps determine the correct amount of fuel to inject. When it malfunctions, the engine may hesitate, idle roughly, or stall. Poor acceleration and decreased fuel-efficiency are also common symptoms. A dirty or faulty sensor is a frequent reason the check engine light turns on.

Worn or Failing Spark Plugs

Spark plugs are responsible for igniting the air-fuel mixture in the engine’s cylinders. Over time, they wear out, leading to misfires, and causing rough running, poor acceleration, and reduced fuel-economy. When misfires occur, the check engine light is likely to flash on, signaling the need for prompt attention.

Catalytic Converter Issues

The catalytic converter reduces harmful emissions by converting exhaust gases into less toxic substances. Problems with the converter often trigger the check engine light and may be accompanied by decreased engine performance or a sulfur-like smell.

Check Engine Light Repair in Sacramento, CA

When you need auto repair in Sacramento and the surrounding area, contact Freeport Automotive at 916-389-2405. At our local auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call to make an appointment for car care in greater Sacramento, CA!