Auto Diagnostics by Professionally Certified Technicians in San Antonio
How Does a Mechanic Diagnose a Car Problem?
Accurate automotive diagnostics are the first step in properly repairing a vehicle. They often begin with a diagnostic scan, but this is only the beginning. A complete and accurate diagnosis of a car problem involves a great deal more expertise, specialized equipment, and time than simply plugging a generic scanner into the onboard diagnostics system and reading the trouble codes. To ensure that your vehicle is repaired completely, as quickly as possible, and without any unnecessary expenses, it is essential to find a skilled, trustworthy mechanic to diagnose it.
Automotive Repair Diagnostic Equipment at Auto Service Experts
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In today’s automobiles, many systems that used to be purely mechanical are now electronically integrated with several computers and software programs. These computer-controlled systems are extremely complex and, therefore, require more advanced equipment and specialized expertise to diagnose. At Auto Service Experts, we continuously invest in the most state-of-the-art equipment, highly skilled mechanics, and ongoing training and certifications to remain on top of the rapidly changing field of vehicle diagnostics. Our ASE-certified Master Technicians have provided the highest quality San Antonio car repair services for over 20 years.
What is an On Board Diagnostic System?
All makes & models of modern cars & light trucks (since the mid 90’s) are required to use a standardized on board diagnostic system. This standardization helps professional car repair mechanics to be able to more quickly diagnose problems on different types of vehicles. On board diagnostic systems store information from the vehicle’s computer or engine control module. The engine control module (ECM) is connected to many sensors and microchips that gather information about the operation and performance of various systems within the vehicle. These include the engine, transmission, cooling system, exhaust system, AC, ignition, and more. If the ECM notices that one of the systems is sending data that is outside of its normal operating range, it will make minor adjustments to try to fix the problem. In the event of a problem which the ECM cannot correct, it will cause the check engine light to turn on, and record information about the fault in an internal error log.
Do auto diagnostic scanners diagnose car problems?
Diagnostic trouble codes (DTC) are retrieved from the computer using a scanner. However, these codes don’t actually “diagnose” the vehicle’s problem. They only lead a technician in the right direction. DTCs can tell you which system is not operating properly, but they can not tell you why or what actually caused the malfunction. In other words, trouble codes reveal symptoms of a problem rather than causes of a problem. While you can go to a parts store and have your codes scanned for free, this does not involve an actual diagnosis and leads to many parts being replaced unnecessarily.
Mechanic Services
FREE AC CHECKS!!!! Keep your vehicle comfortable in any weather with our Auto AC & heating repair services. Whether it’s diagnosing AC freon leaks, fixing the AC compressor, or addressing heating system issues, our expert technicians have you covered.
Read moreOur certified transmission specialists provide comprehensive service, repair, and rebuilding on automatic, manual, and hybrid transmissions. From diagnosing issues with gears, clutches, or torque converters to performing differential and clutch repairs, we specialize in keeping your transmission running smoothly.
Read moreOur expert technicians have the skills and experience to handle it all, from routine maintenance like oil changes and spark plug replacements to performance upgrades and complete engine rebuilds. If you’re experiencing issues like a blown head gasket, overheating, or unusual noises, you can count on Auto Service Experts to diagnose the problem accurately and provide efficient repairs. Whether you need a minor adjustment or major overhaul, we’re dedicated to getting your engine back to peak performance.
Read moreOur ASE Certified specialists provide comprehensive brake repair services to ensure your vehicle’s safety and performance. With over 20 years of experience, we specialize in maintaining and repairing automotive braking systems, utilizing only high-quality OEM parts to guarantee lasting results. Our services include thorough brake inspections, pad replacements, and addressing any wear and tear that could compromise your vehicle’s stopping ability.
Read moreWe are San Antonio’s leading shop for hybrid electric vehicle (HEV) repair and maintenance. Our experienced HEV mechancis provide comprehensive services including hybrid transmission repair, electric motor (generator) servicing, electrical diagnostics, hybrid battery replacements, and ABS/brake system repairs. Recognizing the unique needs of HEVs, we utilize specialized equipment and parts to ensure optimal performance and longevity.
Read moreOur mechanics provide advanced car diagnostics to accurately identify and resolve issues with your vehicle’s engine, transmission, electrical system, and more. Using state-of-the-art diagnostic tools, we pinpoint problems quickly, helping you avoid unnecessary repairs and costly breakdowns.
Read moreExpert ASE-certified technicians provide comprehensive engine repair and rebuilding services, including diagnostics, cylinder machining, valve regrinding, and gasket replacements. Services come with a 3-year/36,000-mile warranty, ensuring high-quality restoration of engine performance.
Read moreOur engine performance tune-ups include inspecting and replacing spark plugs, fuel system components, and filters, as well as verifying engine timing and emissions. Common signs of needing a tune-up are reduced power, poor fuel economy, or failing an emissions test
Read moreComprehensive diagnostics and repairs for automotive electrical and electronic systems. Services address issues affecting major vehicle systems, including anti-lock brakes, transmission control modules, and AC components. Common repairs involve alternators, starters, batteries, wiring, and electronic control units. Accurate diagnostics ensure efficient resolution of electrical problems, enhancing overall vehicle performance.
Read moreOur mechanics expertly diagnose and repair vehicle charging systems, including alternator testing, battery evaluation, wiring inspection, and voltage regulation assessment. Services ensure accurate identification and resolution of charging issues to maintain optimal vehicle performance.
Read moreServices include starter motor replacement, ignition coil replacement, and addressing problems such as faulty ignition switches or transmission recognition errors. Our ASE master mechanics emphasize accurate diagnosis to avoid unnecessary part replacements, ensuring efficient and effective repairs.
Read moreOur certified ASE mechanics provide complete suspension and steering repairs to enhance vehicle control and ride comfort. Services include diagnosing and fixing issues with shocks, struts, tie rods, ball joints, and power steering systems. Proper maintenance of these components ensures safe handling and prolongs vehicle lifespan.
Read moreComprehensive exhaust and emissions system maintenance to enhance vehicle performance, fuel efficiency, and safety. Regular services, recommended every 6 months or 6,000 miles, include exhaust manifold repairs, oxygen sensor replacements, and addressing rust or corrosion issues. Proper maintenance prevents harmful emissions from entering the cabin and ensures environmental compliance.
Read moreSpecialized diesel engine services, including diagnostics, repairs, and performance enhancements. We handle various diesel components such as cam sensors, fuel filters, injectors, turbochargers, and more. Regular maintenance not only boosts fuel efficiency but also reduces emissions. Our team of mechanics are experienced with Chevrolet Duramax, Dodge Cummins, and Ford Powerstroke diesel engines.
Read moreComprehensive maintenance and repair services for commercial fleets aimed at minimizing vehicle downtime and ensure optimal performance. Our ASE-certified mechanics specialize in servicing light and medium-duty trucks and vans, providing same-day service, nationwide warranty coverage, and utilizing state-of-the-art equipment. Our shop is an authorized repair facility for ARI Fleet Management, Element Fleet Management, and Enterprise Fleet Management. Services include diesel engine repair, transmission repair and rebuilding, HVAC system repair, brakes, suspension and steering, and more. We also offer special pricing for fleet repairs, complimentary courtesy rides, and financing options.
Read moreHow can relying on trouble codes alone lead to a misdiagnosis?
One of the most common misdiagnoses involves code P0133, which indicates an issue with the O2 sensor response time. Many times, people replace the O2 sensor when this code comes up, but there could be several different causes of this issue (such as an electrical problem or an exhaust leak), which do not require replacing the O2 sensor to repair. This is what is known as “throwing parts at a problem.” This method wastes the time and money involved in replacing unnecessary parts and often fails to fix the problem. When it comes to car problems, the small initial investment in a proper diagnosis is well worth it in the long run.
What is involved in a complete vehicle diagnosis by an Expert Mechanic?
Quality auto repair shops use highly specialized scanners & computer software programs, which are far more advanced than the handheld scanners used at parts stores. Handheld scanners can only read basic codes and not the proprietary codes of different vehicle manufacturers. Professional auto repair facilities also subscribe to automotive databases specific to each different vehicle make and model. These databases contain highly technical and specific information regarding the diagnosis of a particular code on a particular vehicle. A skilled technician researches the proper databases to narrow down possible causes of the problem, then follows a set of procedures to pinpoint the issue and test the diagnosis. This ensures that only the necessary parts are replaced and the problem is repaired completely the first time. Some diagnostics are performed very quickly, such as assessing the need for a brake job or AC service, and others are more in depth such as diagnosing transmission problems.
Why hire an automotive diagnostic expert?
Consider a medical diagnostic. A doctor looks at the patient’s symptoms, then runs tests to gain more information, does further research, and finally combines this information with their experience and expertise to determine the cause and solution to the problem. You could certainly avoid the doctor fee by looking up your symptoms on the internet, but you would probably find that it would be extremely difficult to pinpoint your problem. This is because most symptoms could be caused by any number of different issues.