OBD2 scanners are essential tools for car owners and mechanics alike. They provide a window into a vehicle’s internal systems, revealing diagnostic trouble codes (DTCs) that indicate potential problems. But can all OBD2 scanners clear these codes? Let’s delve into the capabilities of different types of OBD2 scanners and answer this common question.
Types of OBD2 Scanners and Their Code Clearing Capabilities
Understanding the different types of OBD2 scanners available is crucial to understanding their functionalities, including code clearing. Here’s a breakdown:
Basic Code Readers
These entry-level scanners are typically compact and affordable. Their primary function is to read and display DTCs. While most basic code readers can clear codes, not all of them do. Some only provide the code information, requiring a separate tool or method to clear them. If code clearing is a priority, carefully check the product specifications before purchasing a basic code reader.
Scan Tools
Scan tools offer more advanced features compared to basic code readers. They provide real-time data, allowing users to monitor various engine parameters like fuel pressure, oxygen sensor readings, and more. Scan tools almost universally have the capability to clear codes. They often include additional functionalities such as freeze frame data capture, live data graphing, and emissions readiness tests.
Professional-Grade Scanners
These high-end scanners are typically used by professional mechanics and offer the most comprehensive diagnostic capabilities. They can perform complex tasks like bi-directional control, module programming, and advanced diagnostics. Professional-grade scanners always include the ability to clear codes.
Why Clear OBD2 Codes?
Clearing codes is necessary for several reasons:
- Turning off the check engine light: After resolving the underlying issue that triggered a DTC, clearing the code will turn off the check engine light.
- Vehicle registration: Some states require a clear check engine light for vehicle registration.
- Troubleshooting: Clearing codes allows you to see if a problem has been truly fixed or if a new code reappears.
- Starting fresh: Clearing codes allows for a clean slate when diagnosing intermittent problems.
How to Clear Codes with an OBD2 Scanner
The process for clearing codes generally involves the following steps:
- Connect the scanner: Plug the OBD2 scanner into the vehicle’s OBD2 port, usually located under the dashboard.
- Turn on the ignition: Turn the ignition key to the “on” position without starting the engine.
- Access the “clear codes” function: Navigate through the scanner’s menu to find the option to clear or erase codes. This may be labeled as “clear DTCs,” “erase codes,” or something similar.
- Confirm the clearing: The scanner will usually ask for confirmation before clearing the codes.
Choosing the Right OBD2 Scanner for Your Needs
When choosing an OBD2 scanner, consider the following factors:
- Code clearing capability: Ensure the scanner can clear codes if this is a required feature.
- Additional features: Consider whether you need advanced features like live data streaming or bi-directional control.
- Budget: OBD2 scanners range in price from budget-friendly to professional-grade.
Conclusion
While most OBD2 scanners can clear codes, it’s not a universal feature, particularly with basic code readers. Always verify the scanner’s capabilities before purchasing. Understanding the different types of scanners and their functionality will help you choose the right tool for your needs, empowering you to diagnose and resolve car problems effectively. Investing in a quality OBD2 scanner can save you money on diagnostic fees and help keep your vehicle running smoothly.
