Seeing the check engine light illuminate on your dashboard can be stressful. Many drivers immediately wonder if it is safe to continue driving or if serious damage is happening under the hood.

While the check engine light does not always signal a major issue, ignoring it can lead to costly repairs and reduced resale value. Here is what Missouri drivers should know.

What Different Check Engine Light Warnings Mean

Not all check engine lights are the same.

Solid check engine light

A steady light usually indicates a non-emergency issue. This could include a loose gas cap, oxygen sensor failure, or emissions-related problem. While the vehicle may still drive normally, diagnostics should be scheduled soon.

Flashing check engine light

A flashing light signals a more urgent issue, often related to engine misfires. Continuing to drive with a flashing light can damage the catalytic converter and other components. In this case, it is best to reduce speed and seek service immediately.

Is It Safe to Drive?

Whether it is safe to drive depends on how the vehicle feels.

If the light is solid and the vehicle drives normally without strange noises or performance issues, short-term driving may be acceptable. However, you should schedule an inspection as soon as possible.

If you notice:

Rough idling
Reduced power
Strange smells
Loud knocking
Flashing warning light

It is best to limit driving and have the vehicle inspected promptly.

Missouri’s extreme temperatures can worsen minor engine issues. Addressing problems early prevents further damage.

The Diagnostic Process Explained

When you bring your vehicle in for service, technicians connect a diagnostic scanner to your car’s onboard computer system. This retrieves trouble codes that identify which system triggered the warning light.

Common causes include:

Faulty oxygen sensors
Loose or damaged gas caps
Catalytic converter issues
Mass airflow sensor failure
Ignition coil or spark plug problems

Once the code is identified, further inspection confirms the exact repair needed.

Why Ignoring the Check Engine Light Hurts Resale Value

A vehicle with an active check engine light raises concerns for buyers and dealerships.

Unresolved issues reduce trade-in value because dealerships must factor in repair costs. Private buyers may negotiate aggressively if warning lights are present.

Consistent maintenance and quick diagnostics protect your vehicle’s mechanical integrity and long-term value.

When to Schedule an Inspection

You should schedule a diagnostic inspection if:

Your check engine light turns on
Fuel efficiency drops unexpectedly
Engine performance feels different
The light returns after resetting

Even if the issue seems minor, identifying the root cause early prevents larger mechanical damage.

Do Not Ignore the Warning

The check engine light is designed to alert you before small problems become major repairs. Prompt diagnostics protect your engine, maintain fuel efficiency, and preserve resale value.

If your check engine light is on, scheduling a professional inspection now ensures your vehicle stays reliable and safe on Missouri roads.