B1647 Lexus Code - Lost Communication With Side Satellite Sensor Bus Left
Quick Answer
The Side Collision Sensor Left (LH) circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH) is composed of the Center Airbag Sensor Assembly, Side Airbag Sensor LH, and Rear Airbag Sensor LH. Common causes include Faulty Side Airbag Sensor Left (LH), Faulty Rear Airbag Sensor Left (LH), Side Airbag Sensor Left harness is open or shorted. 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 Lexus indicates Lost Communication With Side Satellite Sensor Bus Left.
- Common causes
- Common causes include Faulty Side Airbag Sensor Left (LH), Faulty Rear Airbag Sensor Left (LH), Side Airbag Sensor Left harness is open or shorted.
- 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.
Code B1647 Lexus Description
What are the Possible Causes of the DTC B1647 Lexus?
- Faulty Side Airbag Sensor Left (LH)
- Faulty Rear Airbag Sensor Left (LH)
- Side Airbag Sensor Left harness is open or shorted
- Side Airbag Sensor Left circuit poor electrical connection
- Faulty Center Airbag Sensor Assembly
How to Fix the DTC B1647 Lexus?
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 B1647 Lexus 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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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.
Frequently Asked Questions about B1647 Lexus Code
1. What are the common symptoms of OBDII code B1647 Lexus "Lost Communication With Side Satellite Sensor Bus Left"?
- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the vehicle's airbag system.
2. What are the possible causes of OBDII code B1647 in a Lexus?
- The code B1647 typically indicates a communication error with the side satellite sensor bus on the left side, which could be caused by a faulty sensor, wiring issues, or a problem with the airbag control module.
3. How serious is the OBDII code B1647 in a Lexus?
- The B1647 code is related to the airbag system, so it is important to address this issue promptly to ensure that the airbags function properly in the event of an accident.
4. Can I continue driving my Lexus with the OBDII code B1647 present?
- It is not recommended to continue driving the vehicle with the B1647 code active, as it may compromise the effectiveness of the airbag system in case of a collision.
5. How can I diagnose and repair OBDII code B1647 in my Lexus?
- Diagnosing and repairing the B1647 code typically involves checking the wiring harness, connectors, and the side satellite sensor itself for any faults or damage. Resetting the code after addressing the issue is also necessary.
6. Is it safe to reset the OBDII code B1647 in my Lexus without fixing the underlying issue?
- It is not recommended to reset the B1647 code without fixing the underlying problem, as it could pose a safety risk by potentially disabling the airbag system.
7. Can a DIY enthusiast fix the OBDII code B1647 in a Lexus?
- While some DIY enthusiasts may be able to diagnose and repair the B1647 code themselves, dealing with the airbag system can be complex and dangerous. It is recommended to seek professional help for this issue.
8. How much does it typically cost to repair OBDII code B1647 in a Lexus?
- The cost of repairing the B1647 code can vary depending on the specific cause of the issue. It may involve replacing a faulty sensor, repairing wiring, or addressing problems with the airbag control module.
9. Are there any preventive measures to avoid encountering OBDII code B1647 in a Lexus?
- Regular maintenance and inspection of the airbag system, including checking for loose connections and damaged wiring, can help prevent issues like the B1647 code from occurring.
10. Will fixing the OBDII code B1647 in my Lexus require specialized tools or equipment?
- Repairing the B1647 code may require specialized tools for diagnosing the airbag system, such as an OBDII scanner capable of reading airbag fault codes, as well as basic hand tools for inspecting and repairing wiring connections.
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