B1920 Lexus Code - Short In Rear Pretensioner Squib RH Circuit
Quick Answer
The Rear Pretensioner Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and the Rear Seat Outer Belt Assembly Right (RH). Common causes include Faulty Rear Seat Outer Belt Assembly Right (RH) (Rear Pretensioner Squib RH), Rear Seat Outer Belt Assembly Right (RH) harness is open or shorted, Rear Seat Outer Belt Assembly Right (RH) 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
- B1920 Lexus indicates Short In Rear Pretensioner Squib RH Circuit.
- Common causes
- Common causes include Faulty Rear Seat Outer Belt Assembly Right (RH) (Rear Pretensioner Squib RH), Rear Seat Outer Belt Assembly Right (RH) harness is open or shorted, Rear Seat Outer Belt Assembly Right (RH) 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 B1920 Lexus Description
What are the Possible Causes of the DTC B1920 Lexus?
- Faulty Rear Seat Outer Belt Assembly Right (RH) (Rear Pretensioner Squib RH)
- Rear Seat Outer Belt Assembly Right (RH) harness is open or shorted
- Rear Seat Outer Belt Assembly Right (RH) circuit poor electrical connection
- Faulty Center Airbag Sensor Assembly
How to Fix the DTC B1920 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 B1920 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.
Need more information about the B1920 Lexus code?
Need more information on how to fix the B1920 Lexus code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1920 Lexus 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 B1920 Lexus Code
1. What are the common symptoms of OBDII code B1920 in a Lexus related to a short in the rear pretensioner squib RH circuit?
The common symptoms include the airbag warning light illuminating on the dashboard, potential non-deployment of the seatbelt pretensioner system in the event of a collision, and diagnostic trouble codes stored in the vehicle's computer system.
2. What could cause the OBDII code B1920 in a Lexus indicating a short in the rear pretensioner squib RH circuit?
Possible causes of this code include damaged wiring or connectors in the rear pretensioner squib RH circuit, a faulty pretensioner squib unit, or issues with the vehicle's airbag control module.
3. How can I diagnose the OBDII code B1920 in a Lexus for a short in the rear pretensioner squib RH circuit?
Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the wiring and connectors in the rear pretensioner squib RH circuit for damage, and testing the pretensioner squib unit for proper functionality.
4. Is it safe to drive a Lexus with the OBDII code B1920 indicating a short in the rear pretensioner squib RH circuit?
It is not recommended to drive the vehicle with this code present, as it could compromise the effectiveness of the seatbelt pretensioner system in the event of a collision. We advise getting the issue addressed by a qualified mechanic as soon as possible.
5. Can I repair the OBDII code B1920 related to a short in the rear pretensioner squib RH circuit in a Lexus myself?
Due to the safety implications associated with airbag systems, it is recommended to have this issue diagnosed and repaired by a professional technician with experience in handling airbag-related faults to ensure proper repairs and system functionality.
6. Are there any recalls or technical service bulletins related to the OBDII code B1920 in Lexus vehicles?
It is advisable to check with authorized Lexus dealerships or visit the National Highway Traffic Safety Administration website to see if there are any recalls or technical service bulletins related to the specific issue of a short in the rear pretensioner squib RH circuit.
7. How much does it typically cost to repair the OBDII code B1920 for a short in the rear pretensioner squib RH circuit in a Lexus?
The cost of repairing this issue can vary depending on the specific cause of the fault, the extent of the repairs needed, and labor rates in your area. It is recommended to obtain quotes from reputable repair shops for an accurate estimate.
8. Can resetting the OBDII code B1920 related to a short in the rear pretensioner squib RH circuit in a Lexus resolve the issue?
Simply clearing the fault code without addressing the underlying cause, such as a short in the rear pretensioner squib RH circuit, will not fix the problem. It is essential to diagnose and repair the root cause of the code to ensure the safety and functionality of the airbag system.
9. How long does it typically take to repair the OBDII code B1920 for a short in the rear pretensioner squib RH circuit in a Lexus?
The repair time can vary depending on the complexity of the issue and the availability of parts. It is advisable to consult with a professional technician to get an estimate of the repair timeline based on your specific situation.
10. What precautions should be taken when working on the OBDII code B1920 indicating a short in the rear pretensioner squib RH circuit in a Lexus?
When dealing with issues related to airbag systems, it is crucial to disconnect the vehicle's battery and wait for a specified amount of time before starting any repair work to prevent accidental deployment of the airbags. It is also recommended to follow proper safety procedures outlined in the vehicle's service manual.
Discuss the causes and fixes for B1920 Lexus OBDII Code
Code B1920 Lexus 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.
