AutoCodesGeneric – B0084:39

B0084:39 Code - Right Front Impact Sensor Internal Electronic Failure

Quick Answer

The impact sensors are equipped on vehicles to supplement the Supplemental Inflatable Restraint (SIR) system performance. Common causes include Faulty Right Front Impact Sensor, Right Front Impact Sensor harness is open or shorted, Right Front Impact 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
B0084:39 indicates Right Front Impact Sensor Internal Electronic Failure.
Common causes
Common causes include Faulty Right Front Impact Sensor, Right Front Impact Sensor harness is open or shorted, Right Front Impact 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 1,744
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Oct 24, 2022
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Code B0084:39 Description

The impact sensors are equipped on vehicles to supplement the Supplemental Inflatable Restraint (SIR) system performance. The impact sensors are electronic and are not part of the deployment loops, but instead provide inputs to the inflatable restraint sensing and diagnostic module. The impact sensors can assist in determining the severity of some frontal and side collisions. The Inflatable Restraint Sensing and Diagnostic Module (SDM) uses the input from the impact sensors to assist in determining the severity of a collision, further supporting air bag deployment. If the Inflatable Restraint Sensing and Diagnostic Module determines a deployment is warranted, the Inflatable Restraint Sensing and Diagnostic Module will cause current to flow through the deployment loops deploying the air bags. The Diagnostic Trouble Code (DTC) will be set when the inflatable restraint sensing and diagnostic module has received a Not OK message from the impact sensor.
OBDII Code B0084:39 - Right Front Impact Sensor Internal Electronic Failure - AutoCodes.com
B0084:39 Code - Right Front Impact Sensor Internal Electronic Failure

What are the Possible Causes of the DTC B0084:39?

  • Faulty Right Front Impact Sensor
  • Right Front Impact Sensor harness is open or shorted
  • Right Front Impact Sensor circuit poor electrical connection
  • Faulty Inflatable Restraint Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0084:39?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0084:39 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 B0084:39 code?

Need more information on how to fix the B0084:39 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0084:39 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 B0084:39 Code

1. What does OBDII code B0084:39 mean?

Code B0084:39 indicates an internal electronic failure in the right front impact sensor, which is part of the vehicle's airbag system.

2. What are the common symptoms of code B0084:39?

Symptoms typically include the airbag warning light illuminating on the dashboard and possible deactivation of the airbag system.

3. What causes code B0084:39?

The code is usually caused by a malfunction or internal failure within the right front impact sensor, such as a short circuit, corrosion, or physical damage.

4. Can I drive my car with code B0084:39?

While the vehicle may still be drivable, the airbag system may not function properly in the event of an accident, posing a safety risk.

5. How is code B0084:39 diagnosed?

A mechanic will use a diagnostic scanner to confirm the code and inspect the right front impact sensor and its wiring for damage, corrosion, or loose connections.

6. How do you fix code B0084:39?

Repairs typically involve replacing the faulty right front impact sensor and inspecting or repairing any associated wiring or connectors.

7. Is replacing the right front impact sensor expensive?

The cost depends on the vehicle make and model, but replacing an impact sensor is generally less expensive than other airbag system components.

8. Can I reset the airbag light to clear code B0084:39?

Resetting the airbag light without addressing the underlying issue will not fix the problem, and the code will likely return.

9. What happens if code B0084:39 is ignored?

Ignoring this code can result in the airbag system failing to deploy during a collision, increasing the risk of injury.

10. Can a dirty or wet sensor cause code B0084:39?

Yes, exposure to moisture, debris, or corrosion can damage the sensor internally and trigger this code.

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