AutoCodes – Ford – B0091 Ford

B0091 Ford Code - Left Side Restraints Sensor 1

Quick Answer

The Restraints Control Module (RCM) monitors all of Supplemental Restraint System (SRS) device connections. Common causes include Faulty Left Side Restraints Sensor 1, Left Side Restraints Sensor 1 harness is open or shorted, Left Side Restraints 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: B0091 Ford indicates Left Side Restraints Sensor 1.
Common causes: Common causes include Faulty Left Side Restraints Sensor 1, Left Side Restraints Sensor 1 harness is open or shorted, Left Side Restraints 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 27,572

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0091 Ford Description

The Restraints Control Module (RCM) monitors all of Supplemental Restraint System (SRS) device connections. If the RCM detects a connection or device connected that is not stored in memory or is not configured for the component, the RCM will set a Diagnostic Trouble Code (DTC) and send a message to the Instrument Panel Cluster (IPC) to illuminate air bag warning indicator.

OBDII Code B0091 Ford - Left Side Restraints Sensor 1 - AutoCodes.com — B0091 Ford Code - Left Side Restraints Sensor 1

What does this mean?

What are the Possible Causes of the DTC B0091 Ford?

Faulty Left Side Restraints Sensor 1
Left Side Restraints Sensor 1 harness is open or shorted
Left Side Restraints Sensor 1 circuit poor electrical connection

How to Fix the DTC B0091 Ford?

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 B0091 Ford 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 B0091 Ford code?

Need more information on how to fix the B0091 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0091 Ford 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 B0091 Ford Code

1. What are the common symptoms of OBDII code B0091 for the Left Side Restraints Sensor 1 in a Ford vehicle?

The common symptoms may include the airbag warning light staying illuminated on the dashboard, intermittent or constant issues with the airbag system, and potential non-deployment of the airbags in an accident.

2. What could be the possible causes of OBDII code B0091 in a Ford, specifically related to the Left Side Restraints Sensor 1?

Possible causes may include a malfunctioning left side impact sensor, wiring or connector issues in the sensor circuit, a faulty airbag control module, or a problem with the airbag system calibration.

3. How can I diagnose the OBDII code B0091 for the Left Side Restraints Sensor 1 in my Ford vehicle?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific error code, inspecting the left side impact sensor and its wiring for any visible damage, and conducting further testing as recommended in the vehicle's service manual.

4. Is it safe to drive my Ford with the OBDII code B0091 related to the Left Side Restraints Sensor 1 active?

It is not recommended to drive the vehicle with an active airbag system fault code like B0091, as it may compromise the proper function of the airbags in the event of an accident. Seek professional repair assistance as soon as possible.

5. Can I reset the OBDII code B0091 for the Left Side Restraints Sensor 1 in my Ford without fixing the underlying issue?

While you can clear the error code using an OBDII scanner, it is crucial to address the root cause of the problem to ensure the proper functioning of the airbag system. Resetting the code without repair may lead to safety risks.

6. Are there any DIY repair tips for resolving OBDII code B0091 in a Ford due to issues with the Left Side Restraints Sensor 1?

DIY repair for airbag system issues is not recommended due to the complexity and safety implications involved. It is best to consult a qualified mechanic or dealership with experience in handling airbag system repairs.

7. How much does it typically cost to repair OBDII code B0091 related to the Left Side Restraints Sensor 1 in a Ford vehicle?

The repair cost can vary depending on the specific issue causing the fault code. It is advisable to get a diagnostic assessment from a professional to determine the exact repair needed and associated costs.

8. Will fixing OBDII code B0091 for the Left Side Restraints Sensor 1 in my Ford require replacing the airbag itself?

Not necessarily. While a faulty left side impact sensor or wiring may need to be repaired or replaced, it does not always involve replacing the airbag unit itself. Proper diagnosis will determine the exact component requiring attention.

9. How long does it usually take to repair OBDII code B0091 for the Left Side Restraints Sensor 1 in a Ford vehicle?

The repair time can vary based on the specific cause of the fault code and the complexity of the repair needed. Some cases may be resolved quickly, while others might require more extensive troubleshooting and repair work.

10. Can OBDII code B0091 related to the Left Side Restraints Sensor 1 be a recurring issue in Ford vehicles?

If the root cause of the problem is not effectively addressed during the initial repair, there is a possibility that the fault code may reoccur. Proper diagnosis and thorough repair are essential to prevent recurring issues with the airbag system.