Why the Check Engine Light Comes On

 

The check engine light (also called the malfunction indicator lamp) can light up for many reasons — sometimes it's because of a trivial issue like a loose gas cap to something that could cost you more if left unchecked. 

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Common causes include:

• 🚗 Loose or missing gas cap

• 🔌 Faulty oxygen (O2) sensor

• ⚙️ Emissions system issues

• 🔥 Engine misfire

• 🔍 Failed catalytic converter components

• 🛠 Tune-up or minor maintenance issues
   

Whether the light is steady or flashing, bring your vehicle in — our technicians will read the codes and explain the real issue.

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What Causes My Check Engine Light to Come On?

 

Your check engine light coming on means that your engine needs to be serviced soon. Sometimes, there are other indicators to show what might actually be the problem such as:

 

Flashing Light– There could be a serious engine problem that can damage other component parts. This could mean that:

• The engine is misfiring enough to risk damage to the catalytic converter caused by bad spark plugs, ignition system, and compression problems

• The engine has very low oil pressure

• The engine is overheating

 

Constant On Light– There could be a problem in OBDII emissions system. This could mean that:

• The emission component has failed

• The gas cap is missing or loose

• The engine needs a tune-up

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Find a Memphis-area location near you!

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Signs You Need Immediate Engine Service
Stop driving immediately and seek service if:
 

• 🔥 The check engine light is flashing

• 🛑 You hear engine knocking or irregular noises

• ⚠️ Your vehicle goes into limp mode or loses power

• 💨 You smell fuel or see smoke
   

These symptoms can signal serious engine or emissions issues that can get more expensive if delayed.

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Coleman Taylor honors 'most' extended warranties! Protect your investment and call us!

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Common FAQ's from Our Customers

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1. Is it safe to drive with the check engine light on?

 

It depends on whether the check engine light is solid or flashing. A steady check engine light often means the vehicle should be inspected soon, while a flashing check engine light may indicate a serious problem that could damage the engine or catalytic converter.

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Memphis drivers experiencing rough idling, loss of power, shaking, or transmission shifting issues should have the vehicle diagnosed quickly, especially before driving on I-40, I-55, or I-240.

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Coleman Taylor Transmissions offers check engine light diagnostics and repair services for domestic and import vehicles throughout the Memphis area.

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2. What causes a check engine light to come on?

 

A check engine light can come on for many reasons, including faulty oxygen sensors, ignition coil problems, transmission issues, loose gas caps, emissions system faults, fuel system problems, or engine performance concerns.

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In Memphis stop-and-go traffic and changing weather conditions, drivers may notice check engine warnings during daily commuting or highway driving. A professional diagnostic scan helps identify the exact trouble code and underlying issue.

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Coleman Taylor Transmissions provides computerized engine diagnostics and check engine light inspections in Memphis, TN and nearby communities.

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3. Can a transmission problem trigger the check engine light?

 

Yes. Transmission problems can trigger the check engine light in many vehicles. Symptoms may include delayed shifting, slipping gears, hard shifting, shaking during acceleration, or transmission overheating.

 

Many Memphis drivers are surprised to learn that transmission sensors and drivability problems often activate the check engine warning system. Early diagnosis may help prevent more expensive transmission repairs later.

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Coleman Taylor Transmissions specializes in free transmission diagnostics, driveline repair, and free check engine light service throughout Memphis and surrounding areas.

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4. How long does a check engine light diagnostic take?

 

Most check engine light scans in Memphis only take a short time to retrieve fault codes and identify possible problem areas. However, additional testing may be needed depending on the symptoms and the type of vehicle.

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Drivers in Memphis, Germantown, Bartlett, Cordova, Munford and Southaven often schedule diagnostics when experiencing warning lights, poor fuel economy, rough shifting, or engine performance issues. Early diagnosis can help prevent breakdowns and larger repair bills.

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Coleman Taylor Transmissions provides free check engine light scans and vehicle diagnostics for most makes and models in the Memphis area.

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