B0068 Buick 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 Buick 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.
Code B0068 Buick Description
What are the Possible Causes of the DTC B0068 Buick?
- 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 Buick?
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 Buick 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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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.
Frequently Asked Questions about B0068 Buick Code
1. What are the common symptoms of OBDII code B0068 in a Buick?
- Common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the left front/driver roof rail/head curtain airbag.
2. What causes the OBDII code B0068 in a Buick?
- The code is typically triggered when the voltage in the left front/driver roof rail/head curtain airbag deployment loop is either too high or too low, indicating a fault in the system.
3. How serious is the OBDII code B0068 in a Buick?
- This code relates to the safety systems of the vehicle, so it should be taken seriously. If the airbag system is compromised, it may not deploy properly in the event of a collision.
4. Can I continue driving my Buick with the OBDII code B0068 present?
- It is not recommended to drive the vehicle with this code active, as it could compromise the effectiveness of the airbag system in the event of an accident.
5. How can I diagnose and repair the OBDII code B0068 in my Buick?
- Diagnosis typically involves checking the wiring, connectors, and components related to the left front/driver roof rail/head curtain airbag deployment loop. Repair may involve fixing wiring issues, replacing components, or resetting the system.
6. Are there any safety precautions I should take when working on the airbag system related to code B0068?
- It is crucial to disconnect the vehicle's battery and wait at least 10 minutes before working on the airbag system to avoid accidental deployment.
7. Will resetting the OBDII code B0068 in my Buick solve the issue?
- Resetting the code may temporarily turn off the warning light, but if the underlying issue is not addressed, the code is likely to reappear.
8. How much does it typically cost to repair the OBDII code B0068 in a Buick?
- The cost of repair can vary depending on the specific issue causing the code. It may range from a simple fix like repairing a wire to a more complex component replacement.
9. Can a DIY enthusiast fix the OBDII code B0068 issue in a Buick?
- While some basic diagnosis and repairs can be done by a DIY enthusiast, working on the airbag system can be dangerous and complex. It is recommended to seek professional help for such issues.
10. How often does the OBDII code B0068 occur in Buick vehicles?
- The occurrence of this code can vary, but it is not uncommon in Buick vehicles with airbag system issues. Regular maintenance and inspection can help prevent such codes from appearing.
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