Low End OBD2 Scanner That Can Change Tire Size: Fact or Fiction?

Thinking about grabbing a budget-friendly OBD2 scanner to adjust your tire size? It’s a common question – can a low-end scanner really handle this kind of modification? Let’s dive into the world of OBD2 scanners and see what’s possible.

Understanding OBD2 Scanners and Tire Size Changes

Before we jump into the specifics of low-end scanners, it’s crucial to understand the connection between OBD2 scanners and tire size.

Your car’s computer relies on accurate tire size information to control various systems, including:

Speedometer/Odometer: Calculates speed and distance based on tire rotations.
Anti-lock Braking System (ABS): Modulates brake pressure to prevent wheel lockup, relying on wheel speed sensors influenced by tire size.
Traction Control System (TCS): Manages engine power and braking to maintain traction, also impacted by wheel speed data.

When you change tire size, you alter the circumference of the tire, directly affecting these systems. A larger tire covers more ground per rotation, while a smaller one covers less. This means your speedometer might show a different speed than your actual speed, and your ABS and TCS might not function optimally.

Low-end OBD2 scanner plugged into a car’s OBD2 port

Can a Low-End OBD2 Scanner Change Tire Size?

Here’s the catch – most low-end OBD2 scanners are designed primarily to:

Read and Clear Diagnostic Trouble Codes (DTCs): These codes indicate malfunctions in your vehicle’s systems.
Display Basic Engine Data: This can include RPM, coolant temperature, and oxygen sensor readings.

While they’re excellent for basic diagnostics, they usually lack the advanced functions required to modify tire size settings in your car’s computer.

“Think of it like this,” says John Miller, a seasoned automotive technician with over 20 years of experience, “a basic OBD2 scanner is like a wrench – great for simple tasks, but you need specialized tools for more complex jobs.”

What You Need to Change Tire Size

To properly adjust your tire size settings after installing new tires, you’ll generally need a more sophisticated tool, such as:

Professional-Grade OBD2 Scanner: These scanners offer a wider range of functions, including the ability to access and modify vehicle-specific settings like tire size. They are commonly used by mechanics and experienced DIYers.
Dealer-Level Scan Tool: These are the most advanced diagnostic tools, often specific to certain car brands, and provide comprehensive access to all vehicle systems.

Professional-grade OBD2 scanner displaying tire size adjustment menu

Important Considerations

Before you rush out to buy a new tool, keep in mind:

Vehicle Compatibility: Not all scanners or tools are compatible with every make and model. Research carefully to ensure the tool you choose works with your specific vehicle.
Technical Expertise: Adjusting tire size settings can be complex. If you’re not comfortable with vehicle electronics, it’s best to consult a qualified mechanic.

Conclusion

While a low-end OBD2 scanner is a valuable tool for basic diagnostics, it’s unlikely to provide the functionality needed to change your tire size settings. For this task, investing in a more advanced scanner or seeking professional assistance is recommended. Remember, accurate tire size information is crucial for your safety and the optimal performance of your vehicle.

FAQs

Can I drive with the wrong tire size settings?

It’s not advisable. Inaccurate settings can affect your speedometer/odometer readings, ABS, and TCS, potentially compromising safety.

How much does it cost to have tire size recalibrated?

Costs vary depending on the shop and the complexity of the adjustment.

Are there any risks associated with changing tire size settings?

If done incorrectly, it can lead to vehicle malfunctions or warning lights on your dashboard.

What’s the difference between a professional-grade and dealer-level scan tool?

Dealer-level tools offer the most comprehensive functionality, often specific to certain car brands, while professional-grade scanners provide a broader range of functions for various makes and models.

Can I damage my car by using the wrong OBD2 scanner?

It’s unlikely to cause damage if used correctly. However, attempting to modify settings without proper knowledge and tools can potentially lead to issues.

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