AutoCodes – Mazda – B104D Mazda

B104D Mazda Code - Crash Zone Sensor And Other Sensor Circuits Short To Power Supply

Quick Answer

The Air Bag Control Module monitors the Front Crash Sensor. Common causes include Faulty Front Crash Sensor, Front Crash Sensor harness is open or shorted, Front Crash Sensor 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: B104D Mazda indicates Crash Zone Sensor And Other Sensor Circuits Short To Power Supply.
Common causes: Common causes include Faulty Front Crash Sensor, Front Crash Sensor harness is open or shorted, Front Crash Sensor 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 3,030

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 Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B104D Mazda Description

The Air Bag Control Module monitors the Front Crash Sensor. The Air Bag Control Module sets the OBDII code when the Front Crash Sensor is not to factory specifications.

OBDII Code B104D Mazda - Crash Zone Sensor And Other Sensor Circuits Short To Power Supply - AutoCodes.com — B104D Mazda Code - Crash Zone Sensor And Other Sensor Circuits Short To Power Supply

What does this mean?

What are the Possible Causes of the DTC B104D Mazda?

Faulty Front Crash Sensor
Front Crash Sensor harness is open or shorted
Front Crash Sensor circuit poor electrical connection
Faulty Air Bag Control Module

How to Fix the DTC B104D Mazda?

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 B104D Mazda 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 B104D Mazda code?

Need more information on how to fix the B104D Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B104D Mazda 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 B104D Mazda Code

1. What are the common symptoms of OBDII code B104D in a Mazda related to "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply"?

- Common symptoms may include the airbag warning light illuminating on the dashboard, the SRS (Supplemental Restraint System) system malfunctioning, and potential issues with airbag deployment in case of an accident.

2. What are the possible causes of OBDII code B104D in a Mazda indicating a "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply" fault?

- The code B104D can be triggered by a short circuit to the power supply in the crash zone sensor or other sensor circuits, faulty wiring or connectors, a malfunctioning crash sensor, or issues with the airbag control module.

3. How can I diagnose the OBDII code B104D related to "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply" in my Mazda?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors for any visible damage, and testing the crash zone sensor and related components for proper functionality.

4. Are there any safety precautions to consider when dealing with OBDII code B104D indicating a "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply" issue in a Mazda?

- It is crucial to exercise caution when working on the SRS system, as airbags can deploy accidentally if not handled properly. Disconnect the vehicle's battery and wait at least 10 minutes before starting any repair work.

5. Can I drive my Mazda with the OBDII code B104D related to "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply" illuminated?

- It is not recommended to drive the vehicle with this code active, as it indicates a potential issue with the SRS system, which is essential for occupant safety in the event of a collision. Immediate attention and repair are advised.

6. How can I repair OBDII code B104D in a Mazda signaling a "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply" malfunction?

- Repairing this code may involve repairing or replacing damaged wiring, connectors, or sensors in the crash zone sensor circuit, resetting the SRS system, and clearing the fault code using a diagnostic tool.

7. Is it possible to reset the OBDII code B104D associated with "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply" without fixing the underlying issue?

- While it is possible to clear the fault code temporarily, it will likely reappear if the root cause of the problem, such as a short to power supply in the sensor circuits, is not addressed and resolved.

8. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B104D in a Mazda related to "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply"?

- While some basic troubleshooting steps can be attempted by DIYers, dealing with SRS system faults, including the crash zone sensor circuit, often requires specialized knowledge and tools. It is recommended to consult a professional mechanic for proper diagnosis and repair.

9. Will fixing OBDII code B104D indicating a "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply" fault affect the vehicle's warranty?

- If your Mazda is still under warranty, it is advisable to have the issue diagnosed and repaired by an authorized dealer or service center to ensure that the warranty coverage remains intact.

10. How long does it typically take to repair OBDII code B104D in a Mazda related to "Crash Zone Sensor And Other Sensor Circuits Short To Power Supply"?

- The repair time can vary depending on the exact cause of the fault, the availability of replacement parts, and the complexity of the repair process. It is best to consult with a qualified mechanic for an accurate estimation of the repair timeline.