B1647 Code - Lost Communication With Side Satellite Sensor Bus Left

Quick Answer

The B1647 diagnostic trouble code indicates that there is a communication issue with the side satellite sensor bus on the left side of the vehicle. Common causes include Faulty side satellite sensor, Damaged wiring or connectors connecting the sensor to the vehicle's network, Corrosion or water damage affecting the sensor or its connections. 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

B1647 indicates Lost Communication With Side Satellite Sensor Bus Left.

Common causes

Common causes include Faulty side satellite sensor, Damaged wiring or connectors connecting the sensor to the vehicle's network, Corrosion or water damage affecting the sensor or its connections.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
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Common Causes of B1647

Symptoms of B1647

How to Fix B1647

Cost to Fix B1647

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Code B1647 Information for Specific Makes

• B1647 Acura — Passenger Door LF Antenna Circuit Short
• B1647 Chrysler — Rear Right Turn Control Circuit Low
• B1647 Dodge — Rear Right Turn Control Circuit Low
• B1647 Honda — Passenger Door LF Antenna Circuit Short
• B1647 Jeep — Rear Right Turn Control Circuit Low
• B1647 Lexus — Lost Communication With Side Satellite Sensor Bus Left
• B1647 RAM — Rear Right Turn Control Circuit Low
• B1647 Scion — Lost Communication With Side Satellite Sensor Bus Left
• B1647 Toyota — Lost Communication With Side Satellite Sensor Bus Left

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

• Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
• Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
• Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1647 Code

1. What are the common symptoms of OBDII code B1647 (Lost Communication With Side Satellite Sensor Bus Left)?

- Common symptoms include the airbag warning light illuminating on the dashboard, loss of communication with the side satellite sensor on the left side, and potential issues with the airbag system.

2. What are some possible causes of OBDII code B1647?

- Possible causes include a faulty side satellite sensor on the left side, damaged wiring or connectors, a malfunctioning airbag control module, or a communication error within the system.

3. How can I diagnose the issue related to OBDII code B1647?

- Diagnosing the issue involves using a diagnostic scan tool to retrieve the trouble codes, inspecting the wiring and connectors for damage, testing the side satellite sensor on the left side, and checking the airbag control module for faults.

4. Is it safe to drive with OBDII code B1647 present?

- It is not recommended to drive with this code present, as it indicates a potential issue with the airbag system, which is a critical safety component in the vehicle.

5. How can I repair OBDII code B1647?

- Repairing this code may involve replacing the faulty side satellite sensor on the left side, repairing or replacing damaged wiring and connectors, resetting the airbag control module, and clearing the trouble codes with a diagnostic scan tool.

6. Can I reset OBDII code B1647 without fixing the underlying issue?

- While you can clear the trouble code temporarily, it is important to address the underlying issue causing the code to prevent potential safety risks and ensure the proper functioning of the airbag system.

7. Are there any DIY repair tips for OBDII code B1647?

- DIY repair tips may include checking and securing the wiring and connectors related to the side satellite sensor, ensuring proper connections, and following the manufacturer's service manual for specific troubleshooting steps.

8. How can a professional mechanic help with OBDII code B1647?

- A professional mechanic can perform a thorough diagnosis of the issue, accurately pinpoint the cause of the code, utilize specialized tools for testing and repairs, and ensure the proper functioning of the airbag system after repairs are made.

9. What other related codes or issues might be associated with OBDII code B1647?

- Other related codes may include communication errors with other airbag system components, such as the right side satellite sensor, airbag control module, or other sensor modules in the vehicle.

10. Can OBDII code B1647 be intermittent or permanent?

- This code can be either intermittent, where the communication loss occurs sporadically, or permanent, indicating a persistent issue that needs to be addressed promptly to ensure the safety of the airbag system.