How to Use a Car Scanner for Comprehensive Diagnostics

    ANCLE OBD2 car scanner V6 Pro

    Maintaining your vehicle's health is crucial, and using a car scanner is an essential tool for diagnosing and resolving issues quickly and efficiently. This comprehensive guide will walk you through the process of using a car scanner to keep your vehicle in top condition.

    How To Read The Code Of Numbers On A Car Scanner

    When using a car scanner, understanding how to read the codes is crucial for diagnosing issues effectively. Firstly, connect the scanner to the vehicle's OBD2 port, which is typically located under the dashboard. Once connected, turn the ignition key to the "on" position without starting the engine. The scanner will power on and begin communicating with the vehicle's onboard computer.

    Navigate through the scanner's menu to find the option to read codes. This will vary depending on the model, but generally, you'll see an option labeled "Read Codes" or "Diagnostic Trouble Codes (DTC)." Select this option, and the scanner will retrieve the codes stored in the vehicle's computer.

    The codes will appear as a combination of letters and numbers, such as P0300 or B0131. Each code consists of a letter indicating the system and a four-digit number specifying the fault.

    For instance, "P" stands for powertrain, "B" for body, "C" for chassis, and "U" for network. The first digit after the letter indicates whether the code is manufacturer-specific or generic, while the remaining digits pinpoint the exact issue.

    After retrieving the codes, refer to the scanner's manual or an online database to decode them. Many scanners provide built-in descriptions for common codes, making it easier to understand the problem. For a more comprehensive analysis, consider using online resources or manufacturer-specific diagnostic tools.

    Which Is The Best Car Scanner For The Us

    The ANCEL V6 PRO+ stands out for its comprehensive features and user-friendly design.

    • Active Test / Bi-Directional Control: This feature allows the scanner to send commands to various systems/components to test their functionality.

    • Key Programming Immobilizer: The ANCEL V6 PRO+ can program new keys and immobilizers, making it an invaluable tool for car security.

    • ALL System Diagnostics: It can diagnose issues across all systems in the vehicle, providing a complete overview of the car's health.

    • 8.0-inch Touch Screen: The large, intuitive touch screen makes navigating the scanner’s features easy and efficient.

    How Do You Clear The Codes On A Car Scanner

    Clearing codes on a car scanner is a straightforward process that can help reset the check engine light after addressing the underlying issues. 

    1. Plug the scanner into the vehicle's OBD-II port and turn the ignition to the "on" position without starting the engine.

    2. Navigate through the scanner's menu to find the option for clearing codes. This is often labeled as "Clear Codes," "Erase Codes," or "Reset."

    3. Select the option to clear codes and confirm the action when prompted. The scanner will communicate with the vehicle's computer to erase the stored trouble codes.

    4. After clearing the codes, turn off the ignition and disconnect the scanner. Start the vehicle to ensure the check engine light is no longer illuminated. If the light comes back on, it may indicate that the issue hasn't been fully resolved or there is a new problem.

    It's important to note that clearing the codes doesn't fix the underlying problem. Always diagnose and repair the root cause before erasing the codes. 

    Can A Car Diagnostic Scanner See Codes Previously Cleared By Another Scanner

    Once a diagnostic code is cleared by a scanner, it is erased from the vehicle's primary memory. However, some advanced diagnostic tools and professional-grade scanners can access permanent codes stored in the vehicle's non-volatile memory.

    Permanent codes, also known as mode $0A codes, are designed to remain in the vehicle's memory until the issue is verified as resolved. These codes ensure that critical emissions-related problems are properly addressed before they are cleared.

    To view these codes, the scanner must support mode $0A diagnostics, which is usually found in more advanced models.

    Some modern vehicles keep a log of diagnostic events, which can be accessed by dealership-level or manufacturer-specific diagnostic tools. These logs can provide a history of recent trouble codes and cleared events, offering deeper insights into recurring issues.


    Using a car scanner like the ANCEL V6 PRO+ can transform how you maintain and repair your vehicle. From reading and clearing codes to performing active tests and key programming, this tool provides comprehensive diagnostics and control.

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