AutoCodes – Saturn – B0077 Saturn

B0077 Saturn Code - Left Front/Driver Side Impact Sensor Performance

Quick Answer

The Inflatable Restraint Side Impact Sensor (SIS) utilizes a unidirectional 2-wire circuit. Common causes include Faulty Left Front/Driver Side Impact Sensor (SIS), Left Front/Driver Side Impact Sensor (SIS) harness is open or shorted, Left Front/Driver Side Impact Sensor (SIS) 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: B0077 Saturn indicates Left Front/Driver Side Impact Sensor Performance.
Common causes: Common causes include Faulty Left Front/Driver Side Impact Sensor (SIS), Left Front/Driver Side Impact Sensor (SIS) harness is open or shorted, Left Front/Driver Side Impact Sensor (SIS) 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 1,397

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 B0077 Saturn Description

The Inflatable Restraint Side Impact Sensor (SIS) utilizes a unidirectional 2-wire circuit. The SIS modulates current on the interface to send ID, State of Health, and deployment commands to the Inflatable Restraint Sensing and Diagnostic Module (SDM). The SDM serves as a power source and a ground for the SIS. When the ignition is turned on and input power from the SDM is first detected, the SIS responds by performing internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time is less than 5 seconds. The SIS continually communicates status messages to the SDM, which determines if a fault is present in the SIS circuit. When a fault is detected, the SDM resets the SIS twice by removing and reapplying power. If the fault is still present, the SDM will set a Diagnostic Trouble Code (DTC).

OBDII Code B0077 Saturn - Left Front/Driver Side Impact Sensor Performance - AutoCodes.com — B0077 Saturn Code - Left Front/Driver Side Impact Sensor Performance

What does this mean?

What are the Possible Causes of the DTC B0077 Saturn?

Faulty Left Front/Driver Side Impact Sensor (SIS)
Left Front/Driver Side Impact Sensor (SIS) harness is open or shorted
Left Front/Driver Side Impact Sensor (SIS) circuit poor electrical connection
Faulty Inflatable Restraint Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0077 Saturn?

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 B0077 Saturn 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 B0077 Saturn code?

Need more information on how to fix the B0077 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0077 Saturn 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 B0077 Saturn Code

1. What are the common symptoms of OBDII code B0077 (Saturn)?

The common symptoms of OBDII code B0077 for a Saturn vehicle include the airbag warning light illuminating on the dashboard and potential issues with the airbag system.

2. What does the OBDII code B0077 (Saturn) indicate?

OBDII code B0077 in a Saturn vehicle specifically refers to a Left Front/Driver Side Impact Sensor Performance issue, indicating a potential problem with the impact sensor on the driver's side.

3. What are the possible causes of OBDII code B0077 (Saturn)?

Possible causes of OBDII code B0077 in a Saturn vehicle can include a faulty impact sensor, wiring issues, a loose connection, or a malfunction in the airbag control module.

4. How can I diagnose the OBDII code B0077 (Saturn)?

Diagnosing OBDII code B0077 typically involves using a scan tool to retrieve the specific fault code, inspecting the impact sensor and related wiring for any visible damage, and conducting thorough testing of the airbag system components.

5. Is it safe to drive with OBDII code B0077 (Saturn) present?

It is not recommended to drive with OBDII code B0077 present, as it indicates a potential issue with the driver's side impact sensor, which is a crucial component of the vehicle's airbag system.

6. How can I repair OBDII code B0077 (Saturn)?

Repairing OBDII code B0077 may involve replacing the left front/driver side impact sensor, repairing any damaged wiring or connections, or resetting the airbag system after addressing the underlying cause of the issue.

7. Can I reset the OBDII code B0077 (Saturn) without fixing the underlying problem?

While you can clear the OBDII code B0077 using a scan tool, it is crucial to address the underlying issue causing the fault code to prevent potential safety risks and ensure the proper functioning of the airbag system.

8. Are there any DIY tips for troubleshooting OBDII code B0077 (Saturn)?

DIY tips for troubleshooting OBDII code B0077 may include visually inspecting the impact sensor and wiring for any obvious damage, checking for loose connections, and ensuring the airbag system is properly connected.

9. How much does it cost to repair OBDII code B0077 (Saturn) at a mechanic?

The cost of repairing OBDII code B0077 at a mechanic can vary depending on the specific issue, parts needed, labor costs, and location, but it may range from a few hundred to over a thousand dollars.

10. Can OBDII code B0077 (Saturn) be a recurring issue after repair?

If the underlying cause of OBDII code B0077 is not properly addressed during repair, it can potentially recur. It is essential to ensure the correct diagnosis and repair of the issue to prevent it from happening again.