AutoCodes – KIA – B1909 KIA

B1909 KIA Code - Rear Sensor 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: B1909 KIA indicates Rear Sensor 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 839

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 B1909 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 B1909 KIA - Rear Sensor Signal Fault - AutoCodes.com — B1909 KIA Code - Rear Sensor Signal Fault

What does this mean?

What are the Possible Causes of the DTC B1909 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 B1909 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 B1909 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 B1909 KIA Code

1. What are the common symptoms of OBDII code B1909 in a KIA, indicating a rear sensor signal fault?

- Common symptoms include issues with the rear parking sensors, such as inconsistent beeping or complete failure to detect obstacles behind the vehicle.

2. What are the possible causes of the B1909 code indicating a rear sensor signal fault in a KIA?

- The code B1909 can be triggered by a faulty rear sensor, damaged wiring, or a malfunctioning control module responsible for processing sensor signals.

3. How can I diagnose the B1909 OBDII code related to a rear sensor signal fault in my KIA?

- Diagnosis involves using an OBDII scanner to read the code, checking the rear sensors and wiring for physical damage, and testing the control module's functionality.

4. Can I still drive my KIA with the B1909 code indicating a rear sensor signal fault?

- It is generally safe to drive the vehicle with this code, but you may experience issues with the rear parking sensors not functioning correctly, affecting your ability to park safely.

5. What are some repair tips for fixing the B1909 code indicating a rear sensor signal fault in a KIA?

- Repair tips include inspecting and repairing damaged wiring, replacing faulty rear sensors, and reprogramming or replacing the control module if necessary.

6. Will resetting the OBDII code B1909 related to a rear sensor signal fault in my KIA fix the issue?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the rear sensor signal fault. Proper diagnosis and repair are needed.

7. How much does it typically cost to repair the B1909 code indicating a rear sensor signal fault in a KIA?

- The cost of repair can vary depending on the extent of the issue, but it may involve replacing sensors, repairing wiring, or reprogramming the control module, which can range from $100 to $500 or more.

8. Are there any preventive measures to avoid the B1909 OBDII code related to a rear sensor signal fault in my KIA?

- Regularly inspecting the rear sensors, keeping them clean, and addressing any issues promptly can help prevent the occurrence of the B1909 code indicating a rear sensor signal fault.

9. Can extreme weather conditions impact the occurrence of the B1909 OBDII code indicating a rear sensor signal fault in a KIA?

- Yes, extreme weather conditions such as heavy rain, snow, or extreme temperatures can affect the performance of the rear sensors and potentially trigger the B1909 code.

10. Is it necessary to take my KIA to a dealership for repair when experiencing the B1909 code indicating a rear sensor signal fault?

- While a dealership may have specialized knowledge and tools, independent auto repair shops or skilled DIY enthusiasts can also diagnose and repair the B1909 code related to a rear sensor signal fault in a KIA.