B1637 2018 Toyota RAV4 Code - Lost Communication With Rear Airbag Sensor Left
Quick Answer
The Side Airbag Sensor Left (LH) or Rear Airbag Sensor Right (RH) consists of the Diagnostic Circuit, the Lateral Deceleration Sensor, etc. Common causes include Faulty Rear Airbag Sensor Left (LH), Rear Airbag Sensor Left harness is open or shorted, Rear Airbag Sensor Left 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
- B1637 2018 Toyota RAV4 indicates Lost Communication With Rear Airbag Sensor Left.
- Common causes
- Common causes include Faulty Rear Airbag Sensor Left (LH), Rear Airbag Sensor Left harness is open or shorted, Rear Airbag Sensor Left 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.
Code B1637 2018 Toyota RAV4 Description
What are the Possible Causes of the DTC B1637 2018 Toyota RAV4?
- Faulty Rear Airbag Sensor Left (LH)
- Rear Airbag Sensor Left harness is open or shorted
- Rear Airbag Sensor Left circuit poor electrical connection
- Faulty Center Airbag Sensor Assembly
How to Fix the DTC B1637 2018 Toyota RAV4?
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 B1637 2018 Toyota RAV4 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 B1637 2018 Toyota RAV4 code?
Need more information on how to fix the B1637 2018 Toyota RAV4 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1637 2018 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area
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 B1637 2018 Toyota RAV4 Code
1. What are the common symptoms of OBDII code B1637 in a 2018 Toyota RAV4?
The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the rear airbag system.
2. What does the OBDII code B1637 "Lost Communication With Rear Airbag Sensor Left" in a 2018 Toyota RAV4 mean?
This code indicates a communication failure between the vehicle's onboard diagnostic system and the rear airbag sensor on the left side.
3. What are the possible causes of OBDII code B1637 in a 2018 Toyota RAV4?
Possible causes include a faulty rear airbag sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning airbag control module.
4. How can I diagnose OBDII code B1637 in my 2018 Toyota RAV4?
Diagnosing this code typically involves checking the wiring and connectors related to the rear airbag sensor, inspecting the sensor itself, and testing the airbag control module for proper functionality.
5. Can I continue driving my 2018 Toyota RAV4 with OBDII code B1637 present?
It is recommended to address airbag-related issues promptly to ensure the safety features of your vehicle are fully functional. We advise against prolonged driving with this code unresolved.
6. How can I repair OBDII code B1637 in my 2018 Toyota RAV4?
Repairing this code may involve replacing the faulty rear airbag sensor, repairing damaged wiring or connectors, resetting the airbag control module, or addressing any other underlying issues identified during diagnosis.
7. Is it safe to reset the OBDII code B1637 in my 2018 Toyota RAV4 without fixing the underlying issue?
Resetting the code without addressing the underlying problem may temporarily turn off the warning light but will not fix the root cause of the communication failure between the system and the rear airbag sensor.
8. How much does it typically cost to repair OBDII code B1637 in a 2018 Toyota RAV4?
The cost of repairing this code can vary depending on the specific issue causing the communication failure. Costs may include parts, labor, and diagnostic fees.
9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B1637 in a 2018 Toyota RAV4?
While some aspects of diagnosing and repairing this code may be within reach for a DIY enthusiast, working on airbag systems can be complex and potentially dangerous. It is recommended to seek professional help for such repairs.
10. Are there any recalls or technical service bulletins related to OBDII code B1637 in a 2018 Toyota RAV4?
It is advisable to check with Toyota authorized service centers or visit the National Highway Traffic Safety Administration (NHTSA) website for any recalls or technical service bulletins related to this specific OBDII code and vehicle model.
Discuss the causes and fixes for B1637 2018 Toyota RAV4 OBDII Code
Code B1637 2018 Toyota RAV4 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
