how to fix B1261 code in Honda Pilot YF3 (2016-2022)

Solution

1. Preparation

• Gather tools and parts necessary for the repair.
• Ensure the vehicle is parked on a flat surface and the ignition is off.
• Disconnect the battery to prevent any electrical shock.

2. Inspect and Clean Battery Connections

• Remove the negative terminal first, followed by the positive terminal.
• Clean the terminals and battery posts using a wire brush and a mixture of baking soda and water to neutralize corrosion.
• Rinse with clean water and dry thoroughly.
• Reconnect the positive terminal first, then the negative terminal, ensuring a tight fit.

3. Replace Battery (if necessary)

• If the battery voltage is consistently low or fails the load test:
  1. Remove the battery hold-down bracket using a socket set.
  2. Carefully lift the battery out of the tray.
  3. Install the new battery in reverse order, ensuring proper orientation.
  4. Reconnect the battery terminals, ensuring they are secure.

4. Test and Replace Alternator (if necessary)

• If the alternator output is below 13.5V:
  1. Disconnect the battery again.
  2. Remove the drive belt from the alternator by loosening the tensioner.
  3. Disconnect the wiring harness and remove mounting bolts to take out the alternator.
  4. Install the new alternator, reconnect the wiring harness, and reattach the drive belt.

5. Clear Codes and Test Drive

• Reconnect the battery and use the OBD-II scanner to clear the B1261 code.
• Perform a test drive to verify that the issue has been resolved and the warning lights do not reappear.