AutoCodes – Hyundai – B1906 Hyundai

B1906 Hyundai Code - Front Sensor PWM Signal Fault

Quick Answer

The Adaptive Front-Lighting System (AFLS) provides the driver with the best visibility by adjusting the vertical direction of the headlamp. Common causes include Faulty Front Height Sensor, Front Height Sensor harness is open or shorted, Front Height 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: B1906 Hyundai indicates Front Sensor PWM Signal Fault.
Common causes: Common causes include Faulty Front Height Sensor, Front Height Sensor harness is open or shorted, Front Height 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.

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Code Popularity 1,716

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 Jul 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1906 Hyundai Description

The Adaptive Front-Lighting System (AFLS) provides the driver with the best visibility by adjusting the vertical direction of the headlamp. The AFLS drive Leveling Actuator-Intelligent Stepper Motor for adjusting up and down, and Swivel Actuator for adjusting right and left side. It consists of AFLS ECU, Leveling Actuator-Intelligent Stepper Motor, Swivel Actuator, Headlamp switch, Height sensor (not applied to ECS). Height sensor input information of vehicle's altitude to AFLS ECU. Height sensor consists of rotor, stator, PCB coil, sensor lever. The height sensor is not-contact point type sensor use lever's movements angle that measures formed the magnetic field at around stator by rotator's revolution.

OBDII Code B1906 Hyundai - Front Sensor PWM Signal Fault - AutoCodes.com — B1906 Hyundai Code - Front Sensor PWM Signal Fault

What does this mean?

What are the Possible Causes of the DTC B1906 Hyundai?

Faulty Front Height Sensor
Front Height Sensor harness is open or shorted
Front Height Sensor circuit poor electrical connection

How to Fix the DTC B1906 Hyundai?

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 B1906 Hyundai 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.

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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 B1906 Hyundai Code

1. What are the common symptoms of OBDII code B1906 Hyundai (Front Sensor PWM Signal Fault)?

The common symptoms of this code may include issues with the front sensor system, such as inaccurate readings, warning lights on the dashboard, or problems with advanced safety features.

2. What are the possible causes of the Front Sensor PWM Signal Fault (B1906) in a Hyundai?

Possible causes of this fault code can include damaged wiring, a faulty sensor, sensor alignment issues, or a malfunction in the sensor's control module.

3. How can I diagnose the Front Sensor PWM Signal Fault (B1906) in my Hyundai?

Diagnosing this fault code involves using an OBDII scanner to retrieve the code, inspecting the front sensor wiring and connections, and testing the sensor's functionality for any irregularities.

4. Can I drive my Hyundai with the Front Sensor PWM Signal Fault (B1906) code present?

It is not recommended to drive the vehicle with this fault code present, as it may affect the accuracy of safety features like collision avoidance systems.

5. How can I repair the Front Sensor PWM Signal Fault (B1906) in my Hyundai?

Repairing this fault code may involve repairing or replacing damaged wiring, realigning or replacing the front sensor, or reprogramming the sensor control module.

6. Is it possible to reset the OBDII code B1906 in a Hyundai without fixing the issue?

Resetting the code without fixing the underlying issue is not recommended, as the problem will likely persist and could compromise the vehicle's safety systems.

7. How much does it typically cost to repair the Front Sensor PWM Signal Fault (B1906) in a Hyundai?

The cost of repairing this fault code can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can extreme weather conditions cause the Front Sensor PWM Signal Fault (B1906) in a Hyundai?

Extreme weather conditions, such as excessive heat or moisture, can potentially damage the front sensor system and contribute to the occurrence of this fault code.

9. Are there any preventive maintenance steps to avoid the Front Sensor PWM Signal Fault (B1906) in a Hyundai?

Regularly inspecting the front sensor system, ensuring proper sensor alignment, and addressing any issues promptly can help prevent the occurrence of this fault code.

10. Will the Front Sensor PWM Signal Fault (B1906) in a Hyundai cause the vehicle to fail an emissions test?

The presence of this fault code alone may not cause the vehicle to fail an emissions test, but it is important to address the underlying issue to ensure the vehicle's safety systems are functioning properly.