AutoCodes – Generic – B1642

B1642 Code - Lost Communication With Side Satellite Sensor Bus Right

Quick Answer

The Side Collision Sensor Right (RH) circuit (to determine deployment of the Front Seat Side Airbag Assembly RH and Curtain Shield Airbag Assembly RH) is composed of the Center Airbag Sensor Assembly, Side Airbag Sensor RH, and Rear Airbag Sensor RH. Common causes include Faulty Side Airbag Sensor Right (RH), Faulty Rear Airbag Sensor Right (RH), Side Airbag Sensor Right 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: B1642 indicates Lost Communication With Side Satellite Sensor Bus Right.
Common causes: Common causes include Faulty Side Airbag Sensor Right (RH), Faulty Rear Airbag Sensor Right (RH), Side Airbag Sensor Right 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.

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Code Popularity 8,909

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 Oct 10, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1642 Description

The Side Collision Sensor Right (RH) circuit (to determine deployment of the Front Seat Side Airbag Assembly RH and Curtain Shield Airbag Assembly RH) is composed of the Center Airbag Sensor Assembly, Side Airbag Sensor RH, and Rear Airbag Sensor RH. The Side Airbag Sensor RH and Rear Airbag Sensor RH detect impacts to the vehicle and send signals to the Center Airbag Sensor Assembly to determine if the airbag should be deployed. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected for the Side Collision Sensor RH circuit (to determine deployment of the Front Seat Side Airbag Assembly RH and Curtain Shield Airbag Assembly RH).

OBDII Code B1642 - Lost Communication With Side Satellite Sensor Bus Right - AutoCodes.com — B1642 Code - Lost Communication With Side Satellite Sensor Bus Right

What does this mean?

What are the Possible Causes of the DTC B1642?

Faulty Side Airbag Sensor Right (RH)
Faulty Rear Airbag Sensor Right (RH)
Side Airbag Sensor Right harness is open or shorted
Side Airbag Sensor Right circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1642?

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 B1642 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.

Need more information about the B1642 code?

Need more information on how to fix the B1642 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1642 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1642 Lexus — Lost Communication With Side Satellite Sensor Bus Right
B1642 Scion — Lost Communication With Side Satellite Sensor Bus Right
B1642 Toyota — Lost Communication With Side Satellite Sensor Bus Right

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 B1642 Code

1. What are the common symptoms of OBDII code B1642?

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

2. What are the possible causes of OBDII code B1642?

- Possible causes of this code include a faulty side satellite sensor on the right side, damaged wiring or connections, or a malfunction in the airbag control module.

3. How can I diagnose the issue related to OBDII code B1642?

- Diagnosing the issue involves using a diagnostic scanner to read the code, checking the connections and wiring related to the side satellite sensor on the right side, and conducting a thorough inspection of the airbag system components.

4. Can I still drive my vehicle with OBDII code B1642?

- It is not recommended to drive the vehicle with an unresolved airbag system issue, as it may compromise the safety of the occupants in case of a collision. It is best to address the problem promptly.

5. How can I repair OBDII code B1642?

- Repairing this code typically involves fixing or replacing the faulty side satellite sensor on the right side, repairing any damaged wiring or connections, and resetting the airbag system using a diagnostic scanner.

6. Is it safe to reset the OBDII code B1642 myself?

- While you can attempt to reset the code using a diagnostic scanner, it is crucial to first identify and address the underlying issue causing the code to ensure the proper functioning of the airbag system.

7. Can a mechanic help me fix OBDII code B1642?

- Yes, a qualified mechanic with experience in diagnosing and repairing airbag system issues can help you fix OBDII code B1642 by identifying the root cause and performing the necessary repairs.

8. Are there any safety precautions I should take when dealing with OBDII code B1642?

- When working on the airbag system related to this code, it is essential to disconnect the vehicle's battery and wait for a few minutes to discharge any stored energy to prevent accidental deployment of the airbags.

9. How do I prevent OBDII code B1642 from occurring again in the future?

- To prevent this code from reoccurring, it is essential to perform regular maintenance checks on the airbag system components, ensure proper wiring connections, and address any issues promptly to avoid further damage.

10. Can OBDII code B1642 be a false alarm?

- While it is possible for a diagnostic scanner to display false codes, it is crucial to investigate the issue further to rule out any actual problems with the side satellite sensor or the airbag system.