B1620 Lexus Code - Side Airbag Sensor Right Circuit Malfunction
Quick Answer
The B1620 diagnostic trouble code for Lexus vehicles indicates a malfunction in the side airbag sensor on the right side of the vehicle. Common causes include Wiring issues such as shorts, opens, or damaged wiring harnesses, Faulty side airbag sensor on the right side, Poor electrical connections or corrosion in the sensor circuit. 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
- B1620 Lexus indicates Side Airbag Sensor Right Circuit Malfunction.
- Common causes
- Common causes include Wiring issues such as shorts, opens, or damaged wiring harnesses, Faulty side airbag sensor on the right side, Poor electrical connections or corrosion in the sensor circuit.
- 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 B1620 Lexus Description
The B1620 diagnostic trouble code for Lexus vehicles indicates a malfunction in the side airbag sensor on the right side of the vehicle. The side airbag sensor is a crucial component of the vehicle's safety system, responsible for detecting impacts or collisions on the right side of the vehicle and triggering the deployment of the side airbag to protect occupants in the event of a crash. When this sensor malfunctions, it can compromise the effectiveness of the side airbag system, potentially putting passengers at risk in the event of a side impact collision.
Common Causes of B1620 Lexus
- Wiring issues such as shorts, opens, or damaged wiring harnesses.
- Faulty side airbag sensor on the right side.
- Poor electrical connections or corrosion in the sensor circuit.
- Impact or physical damage to the sensor.
- Issues with the airbag control module or related components.
Symptoms of B1620 Lexus
- Illumination of the airbag warning light on the dashboard.
- Inability to deploy the side airbag on the right side in the event of a collision.
- Diagnostic trouble code B1620 stored in the vehicle's onboard computer.
- Intermittent or erratic behavior of the side airbag system.
How to Fix B1620 Lexus
- Begin by conducting a thorough visual inspection of the wiring harness and connections associated with the side airbag sensor on the right side.
- Use a multimeter to test the continuity of the wiring and check for any shorts or opens in the circuit.
- Inspect the side airbag sensor itself for any physical damage or signs of malfunction.
- If necessary, replace the faulty side airbag sensor with a new, OEM-approved part.
- Clear the diagnostic trouble code from the vehicle's computer and perform a test to ensure that the side airbag system is functioning properly.
Cost to Fix B1620 Lexus
The cost of repairing a side airbag sensor right circuit malfunction (code B1620) on a Lexus vehicle can vary depending on the specific model and year of the vehicle, as well as the extent of the issue. In general, the cost of parts for this repair can range from $200 to $500, with labor costs adding an additional $100 to $200. Overall, the total repair cost for this issue is typically between $300 and $700. It is important to note that diagnostic time and labor rates at auto repair shops can vary, so it is advisable to check with local shops for a more accurate estimate based on your specific circumstances.
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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 B1620 Lexus Code
1. What are the common symptoms of OBDII code B1620 in a Lexus related to the Side Airbag Sensor Right Circuit Malfunction?
Symptoms may include the airbag warning light illuminating on the dashboard, potential non-deployment of the side airbag, and diagnostic trouble codes stored in the vehicle's computer.
2. What are some possible causes of the B1620 code indicating a Side Airbag Sensor Right Circuit Malfunction in a Lexus?
Potential causes can include a faulty side airbag sensor, wiring issues in the circuit, a disconnected or damaged sensor connector, or problems with the airbag control module.
3. How can I diagnose the Side Airbag Sensor Right Circuit Malfunction in my Lexus when the B1620 code is triggered?
Diagnosis typically involves using an OBDII scanner to retrieve the specific code, inspecting the side airbag sensor and its wiring for damage, and testing the sensor's resistance and electrical connections.
4. Can driving with the B1620 code indicating a Side Airbag Sensor Right Circuit Malfunction in a Lexus be dangerous?
Driving with this code present can be risky as the side airbag may not deploy in the event of a side impact collision, potentially compromising occupant safety.
5. Is it possible to reset the B1620 code related to the Side Airbag Sensor Right Circuit Malfunction in a Lexus without performing any repairs?
Resetting the code without addressing the underlying issue is not recommended, as the problem will persist, and the airbag system may remain compromised.
6. Are there any DIY repair tips for fixing the Side Airbag Sensor Right Circuit Malfunction in a Lexus triggering the B1620 code?
DIY repair options are limited due to the critical nature of the airbag system. It is advisable to consult a professional technician or Lexus dealership for proper diagnosis and repair.
7. How much does it typically cost to repair the Side Airbag Sensor Right Circuit Malfunction triggering the B1620 code in a Lexus?
The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, labor, and diagnostic services.
8. Can a Lexus owner resolve the Side Airbag Sensor Right Circuit Malfunction issue causing the B1620 code by simply clearing the code with an OBDII scanner?
Clearing the code may temporarily eliminate the warning light, but it will not fix the underlying problem with the side airbag sensor circuit, which requires proper diagnosis and repair.
9. How important is it to address the Side Airbag Sensor Right Circuit Malfunction triggering the B1620 code promptly in a Lexus?
Prompt attention to this issue is crucial as it directly impacts the functionality of the side airbag system, affecting occupant protection in the event of a side collision.
10. Is it safe to continue driving a Lexus with the B1620 code indicating a Side Airbag Sensor Right Circuit Malfunction unresolved?
It is not advisable to drive the vehicle with this issue unaddressed, as the side airbag may not deploy as intended in a crash, potentially increasing the risk of injury to occupants.
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