AutoCodes – KIA – B1908 KIA

B1908 KIA Code - Rear 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 Rear Height Sensor, Rear Height Sensor harness is open or shorted, Rear 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: B1908 KIA indicates Rear Sensor PWM Signal Fault.
Common causes: Common causes include Faulty Rear Height Sensor, Rear Height Sensor harness is open or shorted, Rear 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 799

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 B1908 KIA Description

The Adaptive Front-Lighting System (AFLS) provides the driver with the best visibility by adjusting the vertical direction of the headlamp. AFLS(Adaptive Front-Lighting System) 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 B1908 KIA - Rear Sensor PWM Signal Fault - AutoCodes.com — B1908 KIA Code - Rear Sensor PWM Signal Fault

What does this mean?

What are the Possible Causes of the DTC B1908 KIA?

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

How to Fix the DTC B1908 KIA?

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 B1908 KIA 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 B1908 KIA Code

1. What are the common symptoms of OBDII code B1908 in a KIA related to a Rear Sensor PWM Signal Fault?

- Common symptoms may include erratic or inaccurate readings from the rear sensor, issues with the vehicle stability control system, and warning lights on the dashboard.

2. What are the possible causes of the Rear Sensor PWM Signal Fault (B1908) in a KIA?

- Possible causes may include damaged wiring or connectors, a faulty rear sensor, issues with the vehicle's electronic control module (ECM), or sensor calibration problems.

3. How can I diagnose the Rear Sensor PWM Signal Fault (B1908) in my KIA?

- Diagnosing the issue typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors for damage, testing the rear sensor for proper operation, and checking the ECM for any related issues.

4. Can I drive my KIA with the B1908 OBDII code indicating a Rear Sensor PWM Signal Fault?

- It is not recommended to drive the vehicle with this fault code present, as it can affect the accuracy of the stability control system and potentially compromise driving safety.

5. What are some repair tips for fixing the Rear Sensor PWM Signal Fault (B1908) in a KIA?

- Repair tips may include repairing or replacing damaged wiring and connectors, calibrating or replacing the rear sensor, resetting the ECM, and ensuring proper installation and alignment of the sensor.

6. How much does it typically cost to repair the Rear Sensor PWM Signal Fault (B1908) in a KIA?

- The cost of repairs can vary depending on the extent of the issue, the specific components that need to be replaced, and whether the repairs are done at a dealership or an independent mechanic. It is recommended to get a professional diagnosis for an accurate estimate.

7. Will resetting the OBDII code B1908 clear the Rear Sensor PWM Signal Fault in my KIA?

- Resetting the code may temporarily clear the fault, but it is important to address the underlying issue causing the fault to prevent it from reoccurring. Simply clearing the code without fixing the problem may lead to continued issues.

8. How important is it to fix the Rear Sensor PWM Signal Fault (B1908) in a timely manner?

- It is important to address this fault promptly to ensure the proper functioning of the vehicle's stability control system, which is crucial for safe driving and handling of the vehicle.

9. Is the Rear Sensor PWM Signal Fault (B1908) a common issue in KIA vehicles?

- While not extremely common, this fault can occur in KIA vehicles, especially in cases where there are issues with the rear sensor, wiring, or ECM.

10. Can I prevent the Rear Sensor PWM Signal Fault (B1908) from happening in my KIA?

- Regular maintenance, including checking the sensor and wiring for damage, keeping the ECM in good condition, and addressing any warning lights or issues promptly, can help prevent this fault from occurring.