AutoCodes – Generic – B1B72

B1B72 Code - Left Side Satellite Acceleration Sensor 1 Internal

Quick Answer

The number 1 side impact sensors are located in the B-pillar area just past the 1st row doors The impact sensors perform their own self-test using power supplied by the Occupant Restraint Controller (ORC) then communicates this status back to the ORC with periodic updates. Common causes include Faulty Left Side Impact Sensor 1, Left Side Impact Sensor 1 harness is open or shorted, Left Side Impact 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: B1B72 indicates Left Side Satellite Acceleration Sensor 1 Internal.
Common causes: Common causes include Faulty Left Side Impact Sensor 1, Left Side Impact Sensor 1 harness is open or shorted, Left Side Impact 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 3,995

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1B72 Description

OBDII Code B1B72 - Left Side Satellite Acceleration Sensor 1 Internal - AutoCodes.com — B1B72 Code - Left Side Satellite Acceleration Sensor 1 Internal

What does this mean?

What are the Possible Causes of the DTC B1B72?

Faulty Left Side Impact Sensor 1
Left Side Impact Sensor 1 harness is open or shorted
Left Side Impact Sensor 1 circuit poor electrical connection
Faulty Occupant Restraint Controller (ORC)

How to Fix the DTC B1B72?

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 B1B72 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 B1B72 code?

Need more information on how to fix the B1B72 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B72 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1B72 Chrysler — Left Side Satellite Acceleration Sensor 1 Internal
B1B72 Dodge — Left Side Satellite Acceleration Sensor 1 Internal
B1B72 Jeep — Left Side Satellite Acceleration Sensor 1 Internal
B1B72 Mitsubishi — Left Side Satellite Acceleration Sensor 1 Internal
B1B72 RAM — Left Side Satellite Acceleration Sensor 1 Internal

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 B1B72 Code

1. What does OBDII code B1B72 mean?

- OBDII code B1B72 refers to the Left Side Satellite Acceleration Sensor 1 Internal fault, indicating a problem with the sensor on the left side of the vehicle related to internal issues.

2. What are the common symptoms of OBDII code B1B72?

- Common symptoms of OBDII code B1B72 may include the airbag warning light illuminating on the dashboard, potential airbag system malfunctions, or diagnostic trouble codes related to the left side satellite acceleration sensor.

3. What are the possible causes of OBDII code B1B72?

- Possible causes of OBDII code B1B72 can include a faulty left side satellite acceleration sensor, damaged wiring or connectors, electronic control unit (ECU) issues, or improper sensor calibration.

4. How can I diagnose the OBDII code B1B72?

- Diagnosing OBDII code B1B72 typically involves using a diagnostic scanner capable of reading airbag system codes to pinpoint the exact issue with the left side satellite acceleration sensor.

5. Can I continue driving with OBDII code B1B72 present?

- It is not recommended to continue driving with OBDII code B1B72 present, as it indicates a potential issue with the airbag system that could affect its functionality in the event of an accident.

6. How can I repair OBDII code B1B72?

- Repairing OBDII code B1B72 may involve replacing the left side satellite acceleration sensor, repairing or replacing damaged wiring or connectors, recalibrating the sensor, or addressing any underlying ECU issues.

7. Do I need special tools to fix OBDII code B1B72?

- Depending on the exact cause of OBDII code B1B72, you may need specialized tools such as a diagnostic scanner, multimeter, wiring diagrams, and potentially airbag system reset tools to properly diagnose and repair the issue.

8. Can OBDII code B1B72 be triggered by a loose connection?

- Yes, OBDII code B1B72 can be triggered by a loose or poor connection between the left side satellite acceleration sensor and the wiring harness, so it's important to check for and address any loose connections during diagnosis.

9. Is it safe to reset the OBDII code B1B72 without fixing the underlying issue?

- It is not recommended to simply reset OBDII code B1B72 without fixing the underlying issue, as this could lead to ongoing safety risks associated with the airbag system's improper functioning.

10. How long does it typically take to repair OBDII code B1B72?

- The time it takes to repair OBDII code B1B72 can vary depending on the exact cause of the issue, but it may take anywhere from a few hours to a full day to properly diagnose and address the problem.