AutoCodesGeneric – B1039

B1039 Code - Crash Zone Sensor 1

Quick Answer

The main G sensor generates a signal voltage when it detects deceleration beyond the specified level caused by a vehicle frontal collision. Common causes include Faulty Crash Zone Sensor 1, Crash Zone Sensor 1 harness is open or shorted, Crash Zone Sensor 1 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
B1039 indicates Crash Zone Sensor 1.
Common causes
Common causes include Faulty Crash Zone Sensor 1, Crash Zone Sensor 1 harness is open or shorted, Crash Zone Sensor 1 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 7,905
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 18, 2024
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Code B1039 Description

The main G sensor generates a signal voltage when it detects deceleration beyond the specified level caused by a vehicle frontal collision. When the airbag diagnosis sensor unit defines both the signal voltage of the "G" sensor and the safing algorithm to be that of a collision that exceeds a specified level, the driving circuit switches on and feeds the electric ignitor of both driver and passenger airbags and pre-tensioner seat belts. The Diagnostic Trouble Code (DTC) will set the Crash Zone Sensor 1 is malfunctioning.
OBDII Code B1039 - Crash Zone Sensor 1 - AutoCodes.com
B1039 Code - Crash Zone Sensor 1

What are the Possible Causes of the DTC B1039?

  • Faulty Crash Zone Sensor 1
  • Crash Zone Sensor 1 harness is open or shorted
  • Crash Zone Sensor 1 circuit poor electrical connection
  • Faulty Airbag Diagnosis Sensor Unit (Air Bag Control Module)

How to Fix the DTC B1039?

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 B1039 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 B1039 code?

Need more information on how to fix the B1039 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1039 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 B1039 Code

1. What are the common symptoms of OBDII code B1039 (Crash Zone Sensor 1)?

The common symptoms include the airbag warning light illuminating on the dashboard, airbag system failure, and potential issues with the vehicle's safety system.

2. What could cause OBDII code B1039 to trigger?

The code B1039 is typically triggered by a malfunction in the Crash Zone Sensor 1, which may be caused by wiring issues, sensor damage, or a faulty connection.

3. How serious is OBDII code B1039 (Crash Zone Sensor 1)?

OBDII code B1039 is a serious issue as it indicates a problem with the vehicle's crash zone sensor, which is crucial for the proper functioning of the airbag system during a collision.

4. Can I continue driving with OBDII code B1039 present?

It is not recommended to drive with OBDII code B1039 as it may compromise the effectiveness of the airbag system in the event of an accident.

5. How can I diagnose OBDII code B1039 at home?

Diagnosing OBDII code B1039 may require specialized tools and knowledge. It is advisable to consult a professional mechanic or use an OBDII scanner to pinpoint the exact cause of the issue.

6. What is the typical repair for OBDII code B1039?

Repairing OBDII code B1039 usually involves inspecting the Crash Zone Sensor 1, checking the wiring and connections, and replacing any damaged components as needed.

7. Are there any DIY tips for fixing OBDII code B1039?

While some basic checks like inspecting the sensor connections and wiring can be done DIY, it is recommended to have a qualified mechanic handle the repair of OBDII code B1039 for accurate diagnosis and proper resolution.

8. How much does it cost to repair OBDII code B1039?

The cost of repairing OBDII code B1039 can vary depending on the extent of the damage, parts needed for replacement, and labor charges. It is advisable to get a few quotes from different auto repair shops for comparison.

9. Can OBDII code B1039 be intermittent?

Yes, OBDII code B1039 can be intermittent, especially if the issue is related to a loose connection or intermittent sensor malfunction. It is important to address the problem promptly to ensure the airbag system's reliability.

10. Is it necessary to reset the OBDII system after repairing code B1039?

After repairing OBDII code B1039, it is recommended to reset the OBDII system to clear the fault code and ensure that the issue has been successfully resolved.

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