B1005 Code - Diagnosis Sensor Unit

Quick Answer

The B1005 diagnostic code refers to an issue with the Diagnosis Sensor Unit in the vehicle. Common causes include Faulty Diagnosis Sensor Unit, Wiring or connection issues with the sensor unit, Corrosion or damage to the sensor unit. 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

B1005 indicates Diagnosis Sensor Unit.

Common causes

Common causes include Faulty Diagnosis Sensor Unit, Wiring or connection issues with the sensor unit, Corrosion or damage to the sensor unit.

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
• Comments
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Common Causes of B1005

Symptoms of B1005

How to Fix B1005

Cost to Fix B1005

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Code B1005 Information for Specific Makes

• B1005 Acura — MICU Lost Communication With Relay Control Module
• B1005 Honda — MICU Lost Communication With Relay Control Module
• B1005 Infiniti — Diagnosis Sensor Unit
• B1005 Nissan — Diagnosis Sensor Unit

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 B1005 Code

1. What are the common symptoms of OBDII code B1005 (Diagnosis Sensor Unit)?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the airbag system.

2. What are the possible causes of OBDII code B1005 (Diagnosis Sensor Unit)?

- The code B1005 can be triggered by a malfunction in the diagnosis sensor unit, faulty wiring, or a poor connection in the airbag system.

3. How can I diagnose OBDII code B1005 (Diagnosis Sensor Unit) at home?

- It is recommended to use an OBDII scanner to retrieve the specific error code, and then inspect the diagnosis sensor unit and associated wiring for any visible damage.

4. Can I continue driving my vehicle with OBDII code B1005 (Diagnosis Sensor Unit)?

- It is not recommended to drive the vehicle with an activated airbag warning light, as it indicates potential issues with the airbag system's functionality.

5. How can I reset OBDII code B1005 (Diagnosis Sensor Unit) after making repairs?

- After fixing the underlying issue causing the code, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

6. Are there any common repair tips for fixing OBDII code B1005 (Diagnosis Sensor Unit)?

- Common repair tips include checking and securing the wiring connections, inspecting the diagnosis sensor unit for damage, and ensuring proper installation.

7. Does OBDII code B1005 (Diagnosis Sensor Unit) affect vehicle safety?

- Yes, OBDII code B1005 related to the diagnosis sensor unit can impact the proper functioning of the airbag system, compromising vehicle safety in the event of a collision.

8. How much does it cost to repair OBDII code B1005 (Diagnosis Sensor Unit) at a mechanic?

- The repair costs for OBDII code B1005 can vary depending on the exact cause of the issue, but it may involve diagnosing the problem, replacing components, and resetting the system.

9. Can OBDII code B1005 (Diagnosis Sensor Unit) be triggered by a loose connection?

- Yes, a loose or poor connection in the diagnosis sensor unit or airbag system wiring can trigger OBDII code B1005 and should be checked during diagnosis.

10. Is it possible to prevent OBDII code B1005 (Diagnosis Sensor Unit) from occurring?

- Regular maintenance and inspections of the airbag system, diagnosis sensor unit, and associated wiring can help prevent issues that lead to OBDII code B1005.