AutoCodes – Generic – B0070

B0070 Code - Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open

Quick Answer

The driver roof rail deployment loop consists of an inflatable restraint roof rail module - right and the roof rail module high and low circuits. Common causes include Faulty Right Front/Passenger Roof Rail/Head Curtain Bag, Right Front/Passenger Roof Rail/Head Curtain Bag harness is open or shorted, Right Front/Passenger 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: B0070 indicates Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open.
Common causes: Common causes include Faulty Right Front/Passenger Roof Rail/Head Curtain Bag, Right Front/Passenger Roof Rail/Head Curtain Bag harness is open or shorted, Right Front/Passenger 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 4,771

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 B0070 Description

The driver roof rail deployment loop consists of an inflatable restraint roof rail module - right 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 B0070 - Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open - AutoCodes.com — B0070 Code - Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open

What does this mean?

What are the Possible Causes of the DTC B0070?

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

How to Fix the DTC B0070?

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 B0070 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 B0070 code?

Need more information on how to fix the B0070 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0070 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0070 Buick — Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open
B0070 Cadillac — Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open
B0070 Chevrolet — Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open
B0070 Ford — Driver Seatbelt Pretensioner 'A' Deployment Control
B0070 GMC — Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open
B0070 Lincoln — Driver Seatbelt Pretensioner 'A' Deployment Control
B0070 Mercury — Driver Seatbelt Pretensioner 'A' Deployment Control

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 B0070 Code

1. What are the common symptoms of OBDII code B0070?

The common symptoms of code B0070 include the airbag warning light being illuminated on the dashboard and a possible message indicating an issue with the Right Front/Passenger Roof Rail/Head Curtain Bag.

2. What could cause the OBDII code B0070 to trigger?

The B0070 code is triggered when the Right Front/Passenger Roof Rail/Head Curtain Bag deployment loop is detected as being open, which could be due to a wiring issue, a faulty sensor, or a problem with the airbag system.

3. How serious is OBDII code B0070?

Code B0070 indicates a fault in the airbag system, specifically related to the Right Front/Passenger Roof Rail/Head Curtain Bag deployment loop. It is important to address this issue promptly as it can affect the proper deployment of the airbag in the event of a collision.

4. Can I continue driving with OBDII code B0070 present?

It is not recommended to continue driving with the B0070 code present, as it indicates a potential problem with the airbag system. Driving with a faulty airbag system can compromise your safety in the event of an accident.

5. How can I diagnose and repair OBDII code B0070?

Diagnosing and repairing code B0070 typically involves checking the wiring and connections related to the Right Front/Passenger Roof Rail/Head Curtain Bag deployment loop, testing the sensors, and addressing any issues found, such as replacing damaged components.

6. Are there any DIY tips for fixing OBDII code B0070?

While it's possible to diagnose some aspects of the B0070 code yourself, repairing issues related to the airbag system can be complex and may require specialized tools and knowledge. It's generally recommended to seek professional help for such repairs.

7. How much does it cost to fix OBDII code B0070?

The cost of fixing OBDII code B0070 can vary depending on the underlying cause of the issue. Repairs may involve replacing sensors, fixing wiring issues, or addressing other components of the airbag system. Costs can range from a few hundred to over a thousand dollars.

8. Can resetting the OBDII system clear the B0070 code?

Resetting the OBDII system may temporarily clear the B0070 code, but if the underlying issue is not addressed, the code is likely to return. It's important to diagnose and repair the root cause of the problem to prevent the code from reappearing.

9. Is it safe to ignore OBDII code B0070?

Ignoring OBDII code B0070 is not recommended, as it indicates a fault in the airbag system. Driving with a malfunctioning airbag system can put you at risk in the event of a collision, as the airbags may not deploy properly.

10. How can I prevent OBDII code B0070 from recurring?

To prevent OBDII code B0070 from recurring, it's essential to address any issues with the airbag system promptly, perform regular maintenance checks on the system, and follow manufacturer recommendations for the care and inspection of the airbags and related components.