Honda Code B123 Service Explained | Expert Guide

When it comes to maintaining your Honda vehicle, following the recommended maintenance schedule is paramount. One crucial aspect of this schedule is the B123 service, which indicates that it’s time for maintenance. Understanding the B123 code and what it entails can help you keep your Honda running smoothly and prevent any potential issues in the long run.

The B123 service encompasses a series of essential maintenance tasks designed to keep your Honda in optimal condition. These tasks include engine oil change, tire rotation, air and cabin filter replacement, and transmission fluid change. By performing these tasks on time, you can ensure that your Honda continues to perform at its best and extends its longevity.

Key Takeaways:

  • The B123 service is an important part of the Honda maintenance schedule.
  • It includes tasks such as engine oil change, tire rotation, and filter replacement.
  • By following the B123 service, you can keep your Honda running smoothly.
  • It’s recommended to reset the B123 code after completing the necessary maintenance.
  • Whether done at a dealership, by an independent mechanic, or DIY, prioritizing the B123 service is crucial for Honda reliability.

Now that you have a better understanding of the Honda Code B123 service, you can ensure that your vehicle receives the necessary maintenance it deserves. By following the recommended maintenance schedule and performing the required tasks, you can enjoy a smooth, reliable, and long-lasting Honda driving experience.

What is Included in the B123 Service?

The B123 service is a comprehensive maintenance package designed to keep your Honda running smoothly and ensure its longevity. This service code consists of several essential tasks that should be performed at specific intervals to maintain the optimal performance of your vehicle.

Here are the specific tasks included in the B123 service:

  1. Engine Oil Change: Regular oil changes are crucial to keep the engine properly lubricated and prevent any damage due to friction. It is recommended to change the engine oil according to Honda’s maintenance schedule.
  2. Tire Rotation: Rotating tires helps maintain even tread wear and prolong tire life. This task involves moving tires from one position to another to ensure even distribution of wear and tear.
  3. Air Filter Replacement: Clean air filters are essential for proper engine performance and fuel efficiency. The B123 service includes replacing the air filter to ensure optimal filtration and airflow.
  4. Cabin Filter Replacement: The cabin filter is responsible for filtering the air that enters the vehicle cabin. Replacing the cabin filter helps maintain clean air inside the car, improving the overall driving experience.
  5. Transmission Fluid Change: The transmission fluid plays a vital role in the smooth operation of the transmission system. As part of the B123 service, the transmission fluid is replaced to ensure proper lubrication and prevent wear and tear.
Regularly performing the B123 service tasks will not only help your Honda perform at its best but also prevent potential issues that could lead to costly repairs down the line. By following the recommended service intervals and keeping up with maintenance, you’ll enjoy a smooth and reliable driving experience.

For a more detailed breakdown of the Honda maintenance schedule and the B123 service code, refer to the following table:

Maintenance Task Service Interval
Engine Oil Change Every 6,000-7,500 miles or 6-12 months, depending on driving conditions
Tire Rotation Every 7,500 miles or every other oil change
Air Filter Replacement Every 30,000-45,000 miles, or as recommended in the owner’s manual
Cabin Filter Replacement Every 15,000-30,000 miles, or as recommended in the owner’s manual
Transmission Fluid Change Every 30,000-60,000 miles, or as recommended in the owner’s manual
Honda B123 Service Intervals

Performing the B123 service as recommended by Honda will help ensure the longevity and reliability of your vehicle. It is always a good practice to consult your vehicle’s owner’s manual or seek professional advice from a Honda dealership or certified technician for specific service recommendations based on your model and driving conditions.

How to Reset Honda B123 Code

After performing the necessary maintenance for the B123 service, you may need to reset the code on your Honda. Here are the steps to reset the B123 code:

  1. Step 1: Start your Honda vehicle and ensure that it is in park.
  2. Step 2: Press and hold the trip reset button on your dashboard for approximately 10 seconds.
  3. Step 3: While continuing to hold the trip reset button, turn the ignition key to the “on” position (but do not start the engine).
  4. Step 4: Keep holding the trip reset button until the maintenance light starts flashing and then goes out. This indicates that the B123 code has been successfully reset.
  5. Step 5: Release the trip reset button and turn off the ignition.

By following these steps, you can reset the B123 code on your Honda and clear the maintenance reminder. It is important to note that resetting the code does not eliminate the need for future maintenance. To keep your Honda in optimal condition, it is recommended to follow the manufacturer’s maintenance schedule and perform the necessary tasks at the designated intervals.


The B123 service is a crucial component of maintaining your Honda vehicle. By adhering to the recommended maintenance schedule and carrying out the necessary tasks, you can guarantee that your Honda remains in optimal condition and continues to deliver peak performance. The B123 code provides a clear indication of the maintenance procedures that must be performed, which include an oil change for the engine, tire rotation, replacement of air and cabin filters, and a transmission fluid change.

It is essential to prioritize the B123 service in order to ensure the longevity and dependability of your Honda. Whether you decide to have the service performed at a Honda dealership, by an independent Honda mechanic, or choose the DIY approach, adhering to the recommended maintenance schedule is of utmost importance. Regularly maintaining your Honda according to the B123 service guidelines will help to identify and resolve potential issues before they become major problems, saving you valuable time and money in the long run.

By following the prescribed maintenance schedule and diligently addressing the B123 service requirements, you can keep your Honda running smoothly and efficiently. This not only enhances the overall driving experience but also safeguards the longevity and resale value of your vehicle. Prioritizing the B123 service means you can enjoy the peace of mind that comes with a well-maintained and reliable Honda.

Ethan Simons

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