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Being in the Auto Repair business for over 35 years, you see a lot of things that happen to vehicles, common problems, and just plain weird stuff.  Old Timers like me understand the slogan that Farmers Insurance has: “We know a lot because we’ve seen a lot”. One common thing all vehicles have is that components wear out, components break, and components fail.  When something happens, the complaint or condition can be the easiest thing to understand.  When something happens, the fix can be as easy as a few bolts and a new part to rebuilding an assembly.  What is most commonly misunderstood, is how to figure out what caused the complaint to determine the proper repair.  The cause of the complaint is usually not easy to figure out.

If your basement constantly has water in it, do you assume a pipe is broken?  If a pipe is broken, do you always know which one and where?  If your side hurts, do you know it’s time to take out your appendix?  If your computer freezes up, do you just replace the hard drive?  In each of these scenarios it takes a little more investigation and diagnosis.  Vehicles are no different.  Vehicles are built by humans.  Humans make mistakes.  Some of the materials used are made to wear.  Some of the materials are not designed to last forever.  Vehicles now have computers controlling mechanical devices.  Tell me there is no room for failure there.  

I’ve mentored a lot of people in my career.  From technicians, service advisors, parts advisors, collision estimators, and managers.  Just like any common person, they want to ask a question and get the answer to the problem.  I think we’ve established, it’s not that easy.  Humans have the ability to learn.  By learning it takes research, trial, and error.  That is the entire vehicle problem-cause process.  Research is finding out all you can about a vehicle or a component on a vehicle.  Research what the component is, what it does, and how it reacts to different conditions.  Correct the condition by repairing or replacing the suspect component.  If it works, you learned what to do, if it doesn’t work you get to start the process over again and you have learned what not to do. 

Remember math class?  If you were given the problem of 3,467 X 52, did the teacher just give you the answer of 180,284? Or did the teacher show you the method of figuring it out?  If you were just given the answer, would you remember it?  Did you remember how to solve the problem?  I sit on the board of education, for automotive, for 2 different schools in my area.  The questions from the schools are usually the same.  What are you seeing in the industry that we need to show our kids.  These schools do not teach kids how to research and diagnose issues.  They introduce them to what automotive components do.  I guess that’s half the battle. 

I believe the question that should be asked, above all else is: “What is the best method of diagnosis for this complaint?”.  What is recommended to figure out what is going on?  What tool is best to determine what is causing this?  Just like learning to figure out a math problem, vehicle diagnosis has many methods.  The only correct method is the one that correctly identifies the cause.

Common Signs and Symptoms of Vehicle Problems

When it comes to figuring out what is wrong with a vehicle, there is rarely an easy answer. Vehicles are complex machines with numerous components that can malfunction or wear out over time. However, there are some common signs and symptoms that can help guide you in diagnosing the problem.

One of the most obvious signs of a vehicle problem is a warning light on the dashboard. Modern vehicles are equipped with a variety of sensors that monitor different systems, such as the engine, brakes, and airbags. When a sensor detects an issue, it will trigger a warning light to alert the driver. Common warning lights include the check engine light, ABS light, and tire pressure monitoring system light. If a warning light comes on, it is important to have the vehicle checked by a professional as soon as possible to prevent further damage.

Another common sign of a vehicle problem is strange noises. Unusual noises can indicate a variety of issues, depending on the type of noise and where it is coming from. For example, a squealing noise when applying the brakes could indicate worn brake pads, while a grinding noise when shifting gears could indicate a problem with the transmission. It is important to pay attention to any new or unusual noises and have them checked out by a mechanic.

Changes in performance can also be a sign of a vehicle problem. If you notice that your vehicle is not accelerating as quickly as it used to, or if it is struggling to maintain speed, there may be an issue with the engine or fuel system. Similarly, if you experience a rough idle or stalling, it could be a sign of a problem with the ignition system or fuel injectors. Any significant changes in performance should be addressed promptly to prevent further damage and ensure the safety of the vehicle.

Leaks are another common symptom of vehicle problems. Fluid leaks can indicate a variety of issues, depending on the color and location of the leak. For example, a green or orange fluid leak could indicate a problem with the coolant system, while a brown or black fluid leak could indicate a problem with the engine or transmission. It is important to identify and address any fluid leaks as soon as possible to prevent damage to the vehicle’s components.

A decrease in fuel efficiency or power can be a sign of a vehicle problem. If you notice that you are filling up your gas tank more frequently than usual, it could indicate a problem with the fuel system, such as a clogged fuel filter or malfunctioning fuel injectors. Decreased fuel efficiency can also be caused by issues with the engine, such as a misfiring cylinder or a faulty oxygen sensor. It is important to address any decrease in fuel efficiency to prevent further damage and save on fuel costs.

While there is no easy answer when it comes to figuring out what is wrong with a vehicle, there are common signs and symptoms that can help guide you in diagnosing the problem. These include warning lights on the dashboard, strange noises, changes in performance, fluid leaks, and a decrease in fuel efficiency. If you notice any of these signs, it is important to have your vehicle checked by a professional to prevent further damage and ensure its safe operation.

Diagnostic Tools and Techniques for Vehicle Troubleshooting

When it comes to figuring out what is wrong with a vehicle, THERE IS NO EASY ANSWER. However, there are diagnostic tools and techniques that can help streamline the troubleshooting process. These tools and techniques are designed to identify and pinpoint the root cause of a vehicle’s problem, allowing mechanics to make accurate and efficient repairs.

One of the most commonly used diagnostic tools is the OBD-II scanner. This tool is connected to the vehicle’s onboard computer system and retrieves error codes that indicate specific issues. Mechanics can then use these error codes as a starting point for further investigation. The OBD-II scanner is a valuable tool because it provides a quick and easy way to gather information about a vehicle’s condition.

In addition to the OBD-II scanner, mechanics also rely on their own experience and expertise to diagnose vehicle problems. They use their knowledge of how different systems and components work together to identify potential issues. This requires a deep understanding of the inner workings of vehicles and the ability to think critically and analytically.

Another diagnostic tool that is commonly used is the multimeter. This tool allows mechanics to measure electrical currents, voltages, and resistances in a vehicle’s electrical system. By testing different components and circuits, mechanics can determine if there are any electrical issues that may be causing problems. The multimeter is an essential tool for troubleshooting electrical problems, which can be some of the most challenging to diagnose.

In addition to these diagnostic tools, mechanics also use a variety of techniques to troubleshoot vehicle problems. One common technique is the process of elimination. Mechanics systematically test different components and systems to determine if they are functioning properly. By ruling out certain possibilities, they can narrow down the potential causes of a problem.

Another technique that mechanics use is visual inspection. By visually inspecting different parts of a vehicle, they can often identify obvious signs of wear, damage, or malfunction. This can provide valuable clues about what may be wrong with the vehicle and help guide the diagnostic process.

While there is no easy answer when it comes to figuring out what is wrong with a vehicle, diagnostic tools and techniques can greatly assist in the troubleshooting process. The OBD-II scanner, multimeter, and visual inspection are all valuable tools that mechanics use to identify and pinpoint the root cause of a vehicle’s problem. Additionally, their own experience and expertise play a crucial role in diagnosing vehicle issues. By combining these tools and techniques, mechanics can make accurate and efficient repairs, getting vehicles back on the road as quickly as possible.