Check Engine Light Diagnosis in San Antonio

Get Fast, Accurate Diagnostics from ASE-Certified Technicians

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Why Is Your Check Engine Light On?

When your check engine light comes on, it’s your car’s way of telling you something is wrong. At Mechanic Auto Shop in San Antonio, TX, we provide advanced diagnostics and expert repairs to pinpoint and fix the issue quickly. Our ASE-Certified Technicians work on all makes and models, including Ford, Chevrolet, Honda, Toyota, BMW, and Mercedes.

Ignoring a check engine light could lead to serious damage and costly repairs. Let us diagnose the problem accurately and get you back on the road with confidence.

Our Check Engine Light Services

Full Computer Diagnostics

Scanning for trouble codes in the engine control module.

Engine Performance Testing

Checking fuel, air, and ignition systems for efficiency.

Emissions System Inspection

Ensuring proper fuel efficiency and emissions control.

Fuel System & Injector Testing

Detecting clogs or fuel delivery issues.

Ignition System Check

Evaluating spark plugs, coils, and timing components.

Cooling System & Thermostat Inspection

Preventing overheating and engine damage.

Common Reasons for a Check Engine Light

Your check engine light could mean many things, from a minor sensor issue to a serious engine problem:

🔋 Loose or Faulty Gas Cap – A simple fix, but it can trigger the light.

🔄 Oxygen Sensor Failure – Can reduce fuel efficiency and increase emissions.

⚙️ Bad Spark Plugs or Ignition Coils – Causes misfiring and poor acceleration.

🌡️ Catalytic Converter Issues – A costly repair that affects emissions and performance.

🛢️ Mass Airflow Sensor Problems – Reduces fuel economy and power.

🚗 EGR Valve or Fuel Injector Problems – Affects fuel combustion and performance.

What to Do When Your Check Engine Light Comes On

🚦 Steady Check Engine Light: Schedule a diagnostic as soon as possible to prevent further issues.

⚠️ Flashing Check Engine Light: Pull over immediately—this signals a severe issue that could damage your engine.

Ignoring the warning light can lead to reduced fuel economy, costly repairs, and even complete engine failure.

Schedule Your Check Engine Light Diagnosis Today!

Don’t let a check engine light slow you down. Visit Mechanic Auto Shop, San Antonio’s trusted auto repair experts, for fast and accurate diagnostics.

Business Info

6460 Randolph Blvd

San Antonio, TX 78233

210-348-0271

Mon-Fri: 9am-6:30pm

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