AutoCodes – Honda – B123F Honda

B123F Honda Code - Automatic Lighting Control Unit/Sensor Internal Error

Quick Answer

The Climate Control Unit monitors the Automatic Lighting Control Unit/Sensor. Common causes include Faulty Sunlight Sensor, Sunlight Sensor harness is open or shorted, Sunlight Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B123F Honda indicates Automatic Lighting Control Unit/Sensor Internal Error.
Common causes: Common causes include Faulty Sunlight Sensor, Sunlight Sensor harness is open or shorted, Sunlight Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 10,800

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B123F Honda Description

The Climate Control Unit monitors the Automatic Lighting Control Unit/Sensor. The Climate Control Unit sets the OBDII code when the Automatic Lighting Control Unit/Sensor is not to factory specifications.

OBDII Code B123F Honda - Automatic Lighting Control Unit/Sensor Internal Error - AutoCodes.com — B123F Honda Code - Automatic Lighting Control Unit/Sensor Internal Error

What does this mean?

What are the Possible Causes of the DTC B123F Honda?

Faulty Sunlight Sensor
Sunlight Sensor harness is open or shorted
Sunlight Sensor circuit poor electrical connection
Faulty Climate Control Unit

How to Fix the DTC B123F Honda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B123F Honda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B123F Honda code?

Need more information on how to fix the B123F Honda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B123F Honda code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B123F Honda Code

1. What are the common symptoms of OBDII code B123F in a Honda related to the Automatic Lighting Control Unit/Sensor Internal Error?

- Common symptoms include erratic behavior of the automatic lighting system, flickering or dimming of headlights, and failure of the system to operate properly.

2. What are the possible causes of OBDII code B123F in a Honda?

- The code B123F in a Honda indicates an internal error in the Automatic Lighting Control Unit/Sensor, which may be caused by a faulty sensor, wiring issues, or a malfunction within the control unit itself.

3. How can I diagnose the source of OBDII code B123F in my Honda?

- Diagnosing the issue typically involves using a diagnostic scanner to read the code, checking the wiring and connections related to the Automatic Lighting Control Unit/Sensor, and testing the sensor for proper functioning.

4. Can I continue driving my Honda with OBDII code B123F present?

- It is generally not recommended to continue driving with the code present, as it may affect the proper functioning of the automatic lighting system, potentially compromising visibility and safety.

5. What are some repair tips for fixing OBDII code B123F in a Honda?

- Repair tips may include checking and repairing any damaged wiring, replacing the faulty sensor or control unit, and clearing the code with a diagnostic scanner after the repair is completed.

6. Is it possible to reset OBDII code B123F in a Honda without fixing the underlying issue?

- While it is possible to clear the code temporarily, it is crucial to address the root cause of the error to prevent it from reoccurring and ensure the proper functioning of the automatic lighting system.

7. Can extreme weather conditions contribute to triggering OBDII code B123F in a Honda?

- Extreme weather conditions such as excessive heat or moisture may potentially affect the sensors or control unit related to the automatic lighting system, leading to the internal error indicated by code B123F.

8. How can I prevent OBDII code B123F from occurring in my Honda in the future?

- Regular maintenance, including checking the automatic lighting system components for any signs of wear or damage, can help prevent issues that may trigger code B123F in the future.

9. Are there any recalls or service bulletins related to OBDII code B123F in Honda vehicles?

- It is advisable to check with a Honda dealership or visit the manufacturer's website to see if there are any recalls or service bulletins addressing the specific issue related to code B123F in Honda vehicles.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B123F in a Honda?

- Depending on the underlying cause, a DIY enthusiast with basic automotive knowledge may be able to address the issue by following repair guides, but it is recommended to consult a professional if unsure about the repair process.