How to Reset Throttle Body with Autel MK808Z Scanner

The throttle body plays a crucial role in the engine system, regulating the airflow into the engine and directly affecting vehicle performance. When the throttle body malfunctions, it often leads to symptoms such as unstable idling or stalling, thus impacting driving safety.

After cleaning or replacing the throttle body, a throttle body reset and relearning process is necessary. This step can be easily accomplished using auto diagnostic tools such as the Autel scanner, saving you time and money.

Today we'll mainly use the Autel MK808Z as an example to learn how to use an Autel scanner to reset the throttle body and relearn it. We hope this guide will be helpful.

Throttle Body

What Is a Throttle Body Relearn?

Over time, carbon deposits can build up inside the throttle body. Let uncorrected, it can affect how it operates, and cleaning the throttle body is often enough to resolve these issues. However, after cleaning, replacing, or repairing the throttle body, the ECU could lose its calibration for the throttle body’s position. That’s where a throttle body relearn comes in.

At the core, a throttle body relearn procedure resets and recalibrates the ECU’s understanding of the throttle body’s fully opened and closed positions. And if it’s not done, your vehicle may experience rough idling, hesitation, or even frequent stalling. You may need to hold your foot on the gas to keep it idling.

When Should You Perform a Throttle Body Reset?

1. After cleaning the throttle body

   After cleaning the throttle body, the carbon deposits are gone and the intake passage becomes smooth. However, the ECU will still control the throttle according to its original "memory", which will lead to inaccurate intake volume calculation, resulting in problems such as abnormal idling and stalling.

   

   Clean The Throttle Body

2. Disconnected car battery

   After a power outage, the throttle parameters learned by the ECU will be cleared. After power is restored, the ECU needs to re-establish the baseline and learn the actual position of the current throttle.

3. The throttle body was replaced

   The mechanical and electrical characteristics of the new and old throttle bodies cannot be exactly the same, and the ECU must relearn the "zero point" and operating range of the new components.

4. The engine ECU has been replaced or reset

   A new or reset ECU lacks previous learning data; it's a "blank slate" and must learn throttle-related data from scratch.

5. Related Fault Symptoms

   If a vehicle exhibits symptoms such as unstable idling, sluggish acceleration response, or abnormally high fuel consumption, after ruling out other causes, the problem can be resolved by relearning the throttle body, which is equivalent to clearing any parameters that the ECU may have "learned incorrectly."

   

   Unstable idling may indicate a throttle body malfunction

Why Use the Autel MK808Z Scanner?

The Autel MK808Z is Autel's latest upgraded OBD2 scanner for 2025. It features a quad-core processor and Android 11, advanced diagnostic functions, and powerful hardware configuration, designed for professionals and DIY enthusiasts.

Key Features:

• OE-Level All System Diagnostics: The Autel MK808Z supports diagnostics for the entire automotive system, including reading and clearing codes for the engine, SRS, ABS, SAS, EPB, BMS, and all OBD II functions.
• 28+ Service Features: 28+ Special Features: This MK808Z diagnostic scanner can help you perform almost any reset service, such as battery management system, electronic parking brake system, tire pressure monitoring system, fuel injectors, throttle, anti-lock braking system, airbags, suspension, intake/exhaust system, etc.
• 3000+ Active Tests: Bi-directional control (active test) of vehicle-specific components (relays, injectors, coils, solenoids valves, actuators, etc.) for testing without manual control; deliver fast results in 5 minutes.
• Wide Vehicle Coverage: The MK808Z supports vehicles from over 150 brands, covering more than 90% of all vehicles.

With OE-level full system diagnostics and 28+ service functions, the Autel MK808Z can easily perform functions such as throttle body reset and relearning.

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Step-by-Step: How to Reset Throttle Body with Autel MK808Z

Step 1: Correctly Connect the Autel MK808Z to the Car

Using the included main cable, connect the Autel MK808Z scanner to the car via the car's OBD II port to communicate with the car's ECU for subsequent operations.

Step 2: Select the Service Menu and Identify Vehicle Information

On the main interface of the Autel MK808Z, select "Service" to enter, select the corresponding car brand, and perform automatic VIN recognition to confirm that the vehicle brand, model, year and other information are correct.

Step 3: Select "Hot Function" to enter the "Throttle" operation interface

After completing the vehicle information input and recognition, select "Hot Functions" in the next interface. Then select "Throttle" to enter the operation interface and perform subsequent operations.

Step 4: Select "Reset Adaptation Value" to begin resetting the throttle body

Select "Reset Adaptation Values" to begin resetting the throttle body. Ensure the ignition switch is on and the engine is off. Click "OK" to complete the throttle body reset.

You can refer to the video below showing how to reset the throttle body of a 2017 Hyundai Accent using an Autel MK808. However, it's worth noting that the procedure may vary slightly depending on the car brand and the Autel scanner model.

Benefits After Reset and Relearn

• To resolve the issue of unstable idling speed and improve the smoothness of car driving.
• Improved throttle response and enhanced driving experience.
• Optimize the air-fuel ratio to improve fuel economy.
• To prevent the fault light from illuminating

Conclusion

The throttle body plays a crucial role in the engine system. When it malfunctions due to dust accumulation or other reasons, it often needs to be reset and relearned to ensure proper idling.

The throttle body reset service function of the Autel MK808Z makes this process easy to perform at home, saving you time and money spent at a repair shop. In addition, you can use the Autel MK808Z for other maintenance services, offering multiple benefits.