AutoCodes – Cadillac – B0068 Cadillac

B0068 Cadillac Code - Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range

Quick Answer

The driver roof rail deployment loop consists of an inflatable restraint roof rail module - left and the roof rail module high and low circuits. Common causes include Faulty Left Front/Driver Roof Rail/Head Curtain Bag, Left Front/Driver Roof Rail/Head Curtain Bag harness is open or shorted, Left Front/Driver Roof Rail/Head Curtain Bag 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: B0068 Cadillac indicates Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range.
Common causes: Common causes include Faulty Left Front/Driver Roof Rail/Head Curtain Bag, Left Front/Driver Roof Rail/Head Curtain Bag harness is open or shorted, Left Front/Driver Roof Rail/Head Curtain Bag 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 942

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0068 Cadillac Description

The driver roof rail deployment loop consists of an inflatable restraint roof rail module - left and the roof rail module high and low circuits. A shorting bar used within the roof rail module connector shorts together both the roof rail module high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. During a side or frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the roof rail module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a Diagnostic Trouble Code (DTC) will be stored in memory.

OBDII Code B0068 Cadillac - Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range - AutoCodes.com — B0068 Cadillac Code - Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range

What does this mean?

What are the Possible Causes of the DTC B0068 Cadillac?

Faulty Left Front/Driver Roof Rail/Head Curtain Bag
Left Front/Driver Roof Rail/Head Curtain Bag harness is open or shorted
Left Front/Driver Roof Rail/Head Curtain Bag circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0068 Cadillac?

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 B0068 Cadillac 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.

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Need more information on how to fix the B0068 Cadillac code? Get Access to Factory Service Manuals

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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 B0068 Cadillac Code

1. What are the common symptoms of OBDII code B0068 in a Cadillac related to the Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range issue?

The common symptoms include the airbag warning light illuminating on the dashboard, potential non-deployment of the left front/driver roof airbag during an accident, and stored fault codes in the vehicle's computer system.

2. What are the possible causes of OBDII code B0068 in a Cadillac?

Potential causes of this code include a faulty left front/driver roof airbag deployment loop, wiring or connection issues in the airbag system, a malfunctioning airbag control module, or a problem with the vehicle's electrical system.

3. How can I diagnose the OBDII code B0068 in my Cadillac?

Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific fault code, inspecting the left front/driver roof airbag system for any visible damage or wiring issues, and testing the components within the airbag system for proper functioning.

4. Is it safe to drive my Cadillac with the OBDII code B0068 indicating a Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range problem?

It is not recommended to drive the vehicle with this code present, as it may indicate a potential safety issue with the airbag system, compromising passenger safety in the event of a collision.

5. What are some repair tips for addressing OBDII code B0068 in a Cadillac?

Repair tips may include checking and repairing any damaged wiring or connections in the left front/driver roof airbag system, replacing the faulty airbag deployment loop, resetting the airbag control module, and clearing the fault codes to see if the issue resolves.

6. Can I reset the OBDII code B0068 in my Cadillac on my own?

While you can attempt to clear the fault code using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent potential safety risks associated with the airbag system.

7. How much does it typically cost to repair OBDII code B0068 in a Cadillac?

The cost of repairs for this code can vary depending on the specific cause of the issue, the extent of the damage, and whether professional diagnostic and repair services are required. It is advisable to consult with a qualified mechanic for an accurate estimate.

8. Are there any recalls or technical service bulletins related to OBDII code B0068 in Cadillac vehicles?

It is recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code in Cadillac vehicles to see if there are any known issues or remedies provided by the manufacturer.

9. How can I prevent OBDII code B0068 from occurring in my Cadillac?

Regular maintenance, including inspections of the airbag system, electrical components, and wiring, can help prevent issues like code B0068. Promptly addressing any warning lights or unusual symptoms in the vehicle can also help prevent more significant problems.

10. Can OBDII code B0068 in a Cadillac be a safety concern?

Yes, OBDII code B0068 indicating a Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range issue can be a safety concern as it may affect the proper deployment of the airbag system in the event of a collision, potentially compromising passenger safety.