AutoCodes – Lexus – B1651 Lexus

B1651 Lexus Code - Manual Cut-Off Switch Trouble

Quick Answer

The Airbag Cut-Off Switch circuit consists of the Center Airbag Sensor and the Airbag Cut-Off Switch. Common causes include Faulty Airbag Cut-Off Switch, Airbag Cut-Off Switch harness is open or shorted, Airbag Cut-Off Switch 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: B1651 Lexus indicates Manual Cut-Off Switch Trouble.
Common causes: Common causes include Faulty Airbag Cut-Off Switch, Airbag Cut-Off Switch harness is open or shorted, Airbag Cut-Off Switch 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.

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Code Popularity 3,838

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 May 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1651 Lexus Description

The Airbag Cut-Off Switch circuit consists of the Center Airbag Sensor and the Airbag Cut-Off Switch. The Front Passenger Airbag can be optionally deactivated via this circuit by turning the Airbag Cut-Off Switch to the OFF position. If the Front Passenger Airbag is deactivated, the passenger airbag OFF indicator comes on to inform the passengers. The Diagnostic Trouble Code (DTC) B1651 is recorded when a malfunction is detected in the Airbag Cut-Off Switch circuit.

OBDII Code B1651 Lexus - Manual Cut-Off Switch Trouble - AutoCodes.com — B1651 Lexus Code - Manual Cut-Off Switch Trouble

What does this mean?

What are the Possible Causes of the DTC B1651 Lexus?

Faulty Airbag Cut-Off Switch
Airbag Cut-Off Switch harness is open or shorted
Airbag Cut-Off Switch circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1651 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 B1651 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 B1651 Lexus code?

Need more information on how to fix the B1651 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1651 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.

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 B1651 Lexus Code

1. What are the common symptoms of OBDII code B1651 in a Lexus related to the manual cut-off switch trouble?

The common symptoms include issues with starting the vehicle, sudden engine stalling, and difficulty in turning the engine off.

2. What can cause the OBDII code B1651 in a Lexus indicating manual cut-off switch trouble?

The code B1651 in a Lexus is typically triggered by a malfunction in the manual cut-off switch or the associated wiring.

3. How can I diagnose the manual cut-off switch issue causing OBDII code B1651 in my Lexus?

To diagnose the problem, you can visually inspect the manual cut-off switch and its wiring for any visible damage or loose connections. Using a multimeter to test the switch functionality can also help pinpoint the issue.

4. Can I repair the manual cut-off switch problem triggering code B1651 in my Lexus on my own?

Depending on the extent of the issue, you may be able to repair the manual cut-off switch problem yourself by replacing the faulty switch or repairing the damaged wiring. However, if you are unsure, it's recommended to seek professional assistance.

5. Is it safe to continue driving my Lexus with OBDII code B1651 related to the manual cut-off switch trouble?

It is not advisable to continue driving your Lexus with the manual cut-off switch issue triggering code B1651, as it can lead to potential safety hazards such as engine stalls or difficulties in turning off the engine.

6. Will resetting the OBDII code B1651 in my Lexus resolve the manual cut-off switch problem?

Simply resetting the code may temporarily clear the error code, but it will not fix the underlying issue with the manual cut-off switch. It's important to diagnose and address the root cause of the problem to prevent further occurrences.

7. Can a faulty manual cut-off switch impact other systems in my Lexus besides triggering code B1651?

Yes, a malfunctioning manual cut-off switch can potentially affect other systems in your Lexus, such as the ignition system, fuel delivery, or even the overall electrical system of the vehicle.

8. How much does it typically cost to repair the manual cut-off switch issue causing OBDII code B1651 in a Lexus?

The cost of repairing the manual cut-off switch issue can vary depending on the extent of the problem, the labor rates of the repair shop, and whether any additional parts need replacement. It's best to get a professional assessment for an accurate estimate.

9. Are there any preventive maintenance tips to avoid encountering OBDII code B1651 in a Lexus due to manual cut-off switch trouble?

Regularly inspecting the manual cut-off switch and its wiring for any signs of wear or damage, and addressing any issues promptly, can help prevent the occurrence of code B1651 in your Lexus.

10. Can a dealership or certified mechanic help me address the manual cut-off switch problem causing OBDII code B1651 in my Lexus?

Yes, seeking assistance from a dealership or a certified mechanic experienced with Lexus vehicles is recommended for accurately diagnosing and repairing the manual cut-off switch issue related to code B1651.