Frequently Asked Questions
Troubleshooting Basics
Learn systematic approaches to diagnosing vehicle problems.
What Are the 7 Troubleshooting Steps?
The 7 troubleshooting steps are: identify the problem, research causes, develop a theory, test the theory, fix the issue, verify the fix, and document...
How to Troubleshoot Your Car
Learn how to troubleshoot your car step by step. Start with symptoms, use diagnostic tools, and systematically test components to find the problem....
What Does It Mean to Troubleshoot a Car?
Learn what it means to troubleshoot a car. Troubleshooting involves systematically identifying and diagnosing vehicle problems through logical testing...
What Is Troubleshooting in an Engine?
Engine troubleshooting is the process of diagnosing problems within the engine system by testing components like spark, fuel delivery, compression, an...
Diagnostics & Scanners
OBD-II scanners, diagnostic tools, and costs.
How Much Does It Cost to Run a Diagnostic Test?
A car diagnostic test costs $40-$150 at most shops. Many auto parts stores offer free code scans. Dealerships typically charge $100-$200 for diagnosti...
Can I Do a Car Diagnostic Myself?
Yes, you can do basic car diagnostics yourself with an OBD-II scanner. These affordable tools read trouble codes and help identify common problems....
How Much Does a Full Diagnostic Cost on a Car?
A full car diagnostic typically costs $80-$150 at most shops. Dealerships may charge $100-$200. Some auto parts stores offer free basic code scans....
Can I Use My Phone as a Car Diagnostic Tool?
Yes, you can use your phone as a car diagnostic tool with a Bluetooth OBD-II adapter and a diagnostic app like Torque, BlueDriver, or OBD Auto Doctor....
What Diagnostic Scanner Do Mechanics Use?
Mechanics use professional scanners like Snap-on, Autel MaxiSys, and Launch X431. Dealerships use manufacturer-specific tools for advanced diagnostics...
Engine Problems
Common engine issues and failure signs.
What Is the Most Common Cause of Car Engine Failure?
The most common cause of car engine failure is lack of oil or oil starvation. Running low on oil causes metal-on-metal friction that destroys engine b...
What Can Be Mistaken for a Bad Engine?
Many issues can be mistaken for a bad engine: dead batteries, clogged fuel filters, failed ignition coils, bad starters, and transmission problems mim...
What Three Things Should Be Checked If a Small Engine Fails to Start?
If a small engine won...
What Are Signs of Engine Problems?
Signs of engine problems include check engine light, unusual noises, rough idling, power loss, excessive smoke, oil leaks, and poor fuel economy....
Maintenance
Vehicle maintenance schedules and tips.
What Is the 30-60-90 Rule for Cars?
The 30-60-90 rule is a car maintenance schedule. At 30K miles, replace filters and fluids. At 60K, add spark plugs and brakes. At 90K, do major servic...