Free Car Diagnostic Checks: Where to Find Them

Maximize Savings with Free Car Diagnostic Tests

Few things can unsettle a driver more than the dreaded ‘check engine light.’ Car diagnostics are essential for proper vehicle maintenance, yet many people tend to overlook them. Auto shops typically charge for diagnostic checks, so if your vehicle seems to be running fine, you might wonder why spend extra money on identifying problems that aren’t obvious.

Fortunately, there are ways to get a diagnostic check for free or at a low cost, ensuring you catch potential issues early. Some options even allow you to pay a small fee now for virtually unlimited future inspections, helping you maintain your car's health without breaking the bank.

What is a Diagnostic Check?

A diagnostic check involves connecting your vehicle to a computer that reads and interprets error codes generated by its onboard diagnostics (OBD) system. These codes can indicate a variety of issues, from minor glitches to major engine problems. Regular diagnostic checks can help you identify and address issues before they become costly repairs.

Where to Get a Free Car Diagnostic Test

Auto Shops and Auto Parts Stores

Some auto shops and auto parts stores offer free diagnostic checks as a service to customers. They can quickly read the OBD codes and provide you with a printout or explanation of any detected issues.

Built-in Diagnostics

Many modern vehicles come equipped with built-in diagnostic systems that can alert you to problems and, in some cases, provide a basic diagnosis through your car’s infotainment system or dashboard.

OBD Scanners and Code Readers

Investing in an OBD scanner or code reader can save you money in the long run. These devices plug into your vehicle’s OBD port and allow you to read and clear error codes. Some auto parts stores, like AutoZone, offer loaner programs where you can borrow a scanner for free.

Free Troubleshooting at AutoZone

AutoZone's free Fix Finder service helps you diagnose that pesky check engine light in under a minute. This comprehensive, technician-backed service provides a printed and emailed report that's easy to understand. Fix Finder checks for various issues, including emission readiness, oil life and level, brake pad life, battery voltage, and tire pressure monitoring system (TPMS) status. It also identifies trouble codes, upcoming recommended maintenance for your vehicle and mileage, and explains what the service soon light indicates, including how to reset it after maintenance. If needed, Fix Finder can even recommend a trusted local shop for repairs. Note that some features, like oil life, oil level, brake pad life, and TPMS information, may not be available for all vehicles.

Does Advance Auto Run Free Diagnostics?

Yes, Advance Auto Parts offers free diagnostic services. You can visit one of their locations, and they will use an OBD scanner to check your vehicle for error codes at no charge.

Does AutoZone Let You Borrow a Scanner?

AutoZone offers a loaner tool program where you can borrow an OBD scanner for free. You pay a deposit, which is refunded when you return the scanner. This allows you to perform diagnostics at home without purchasing the device.

How Do I Use Diagnostic AutoZone?

Using AutoZone’s diagnostic service is simple. Visit a store and ask for a free diagnostic check. An employee will use an OBD scanner to read your vehicle’s error codes and provide you with a report detailing any issues found.

Free Troubleshooting at Advance Auto Parts

Your local Advance Auto Parts store provides free testing services for your starter, alternator, and battery. Visit a nearby store to ensure these critical components are functioning properly without any cost.

Does Advance Auto Parts Give Free Diagnostics?

Yes, Advance Auto Parts offers free diagnostic services. You can visit one of their locations, and they will use an OBD scanner to check your vehicle for error codes at no charge. This service helps identify potential issues with your car, allowing you to address problems before they become costly repairs.

Can Advance Auto Check Your Starter?

Yes, Advance Auto Parts can check your starter. They offer free battery, alternator, and starter testing. If you suspect an issue with your starter, you can bring your car to an Advance Auto Parts store, and they will test it to determine if it is functioning properly.

Can Advance Auto Check Alternator?

Yes, Advance Auto Parts can check your alternator. They provide free alternator testing services to ensure your vehicle's charging system is working correctly. Simply visit an Advance Auto Parts store, and an employee will test your alternator to help diagnose any issues.

How to Check the Electrical System on a Car?

Checking your car's electrical system involves several steps:

1. Battery Test: Use a multimeter to measure the voltage of your battery. A fully charged battery should read around 12.6 volts when the car is off. With the engine running, it should read between 13.7 and 14.7 volts.

2. Alternator Test: Start the car and use the multimeter to check the voltage at the battery terminals. The reading should be between 13.7 and 14.7 volts. If it is lower, the alternator might not be charging the battery properly.

3. Starter Test: If your car has trouble starting, you can test the starter by measuring the voltage drop. Connect the multimeter to the battery terminals, and have someone turn the ignition key. A significant voltage drop indicates a problem with the starter.

4. Inspect Fuses: Check the car's fuse box for blown fuses, which can cause electrical issues.

5. Check Wiring: Look for damaged or corroded wires and connections in the electrical system.

6. Use a Code Reader: Connect an OBD-II scanner to your car's diagnostic port to check for any error codes related to the electrical system.

By performing these tests, you can identify and address issues within your car's electrical system, ensuring it operates smoothly. If you are unsure or uncomfortable performing these checks, consider visiting an auto parts store like Advance Auto Parts for assistance.

Regular diagnostic checks are crucial for maintaining your vehicle and catching potential issues early. By taking advantage of free or low-cost diagnostic services offered by auto parts stores and using OBD scanners, you can ensure your car remains in good health without incurring high costs. This proactive approach can save you money and stress in the long run.