B1206 Code - Diagnosis Sensor Unit

Quick Answer

The B1206 diagnostic code refers to an issue with the Diagnosis Sensor Unit in the vehicle. Common causes include Faulty Sensor Unit: The most common cause of the B1206 code is a malfunctioning or failed Diagnosis Sensor Unit, Wiring Issues: Problems with the wiring or connections to the sensor unit can also trigger this code, Corrosion: Corrosion or damage to the sensor unit or its connectors can lead to issues with its functioning. 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

B1206 indicates Diagnosis Sensor Unit.

Common causes

Common causes include Faulty Sensor Unit: The most common cause of the B1206 code is a malfunctioning or failed Diagnosis Sensor Unit, Wiring Issues: Problems with the wiring or connections to the sensor unit can also trigger this code, Corrosion: Corrosion or damage to the sensor unit or its connectors can lead to issues with its functioning.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
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Common Causes of B1206

Symptoms of B1206

How to Fix B1206

Cost to Fix B1206

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Code B1206 Information for Specific Makes

• B1206 Ford — EIC Switch Assembly Circuit Open
• B1206 Infiniti — Diagnosis Sensor Unit
• B1206 Lexus — Power Window Master Switch Communication Stop
• B1206 Lincoln — EIC Switch Assembly Circuit Open
• B1206 Mercury — EIC Switch Assembly Circuit Open
• B1206 Nissan — Diagnosis Sensor Unit
• B1206 Scion — Power Window Master Switch Communication Stop
• B1206 Toyota — Power Window Master Switch Communication Stop

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 B1206 Code

1. What are the common symptoms of OBDII code B1206 (Diagnosis Sensor Unit)?

- Common symptoms include the airbag warning light staying illuminated on the dashboard and potential issues with the vehicle's airbag system.

2. What can cause OBDII code B1206 to trigger?

- The most common cause of B1206 is a malfunction or failure of the diagnosis sensor unit within the airbag system.

3. How can I diagnose OBDII code B1206?

- Diagnosis of B1206 typically involves using a diagnostic scanner to retrieve the specific trouble code and then inspecting the diagnosis sensor unit and related components for any visible damage or issues.

4. Are there any DIY repair tips for fixing OBDII code B1206?

- DIY repair for B1206 is not recommended due to the complexity and safety implications of working on the airbag system. It is best to seek professional help to diagnose and repair this issue.

5. Can OBDII code B1206 be reset without fixing the underlying issue?

- While you can clear the code temporarily, the underlying issue causing B1206 will persist, and the code is likely to return until the problem is properly diagnosed and repaired.

6. Is it safe to drive with OBDII code B1206 active?

- It is not recommended to drive the vehicle with an active B1206 code, as it signifies a potential problem with the airbag system, which is crucial for occupant safety in the event of a collision.

7. How much does it typically cost to repair OBDII code B1206?

- The cost of repairing B1206 can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. It is advisable to get a professional diagnosis to determine the exact cost.

8. Can a faulty diagnosis sensor unit be repaired, or does it need to be replaced?

- In most cases, a faulty diagnosis sensor unit will need to be replaced rather than repaired. This ensures the proper functioning of the airbag system and maintains safety standards.

9. Are there any recalls or technical service bulletins related to OBDII code B1206?

- It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code B1206, as they may offer solutions or repairs covered under warranty.

10. How long does it take to repair OBDII code B1206?

- The repair time for B1206 can vary depending on the specific issue and the availability of parts. It is recommended to consult with a professional technician to get an accurate estimate of the repair time.