AutoCodes – Chevrolet – B0077 Chevrolet

B0077 Chevrolet 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 Chevrolet 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 7,917

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

What does this mean?

What are the Possible Causes of the DTC B0077 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the B0077 Chevrolet 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 Chevrolet Code

1. What are the common symptoms of OBDII code B0077 Chevrolet related to the Left Front/Driver Side Impact Sensor Performance?

- Common symptoms include the airbag warning light illuminating on the dashboard, potential non-deployment of the airbags during an accident, and diagnostic trouble codes stored in the vehicle's system.

2. What are some possible causes of OBDII code B0077 Chevrolet indicating issues with the Left Front/Driver Side Impact Sensor Performance?

- Causes can include a malfunctioning impact sensor, wiring issues such as shorts or open circuits, faulty connections, or damage to the sensor itself due to impact or corrosion.

3. How can I diagnose the issue related to OBDII code B0077 Chevrolet for the Left Front/Driver Side Impact Sensor Performance?

- Diagnosis typically involves using a scan tool to retrieve the specific trouble code, inspecting the impact sensor and its wiring for damage, and testing the sensor's functionality according to manufacturer guidelines.

4. Can I drive my vehicle with the OBDII code B0077 Chevrolet triggered for the Left Front/Driver Side Impact Sensor Performance?

- It is not recommended to drive with this code active, as it may affect the proper deployment of airbags in the event of a collision. It is advised to address the issue promptly.

5. What are some repair tips for resolving OBDII code B0077 Chevrolet associated with the Left Front/Driver Side Impact Sensor Performance?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, replacing the impact sensor if necessary, and clearing the trouble code from the vehicle's system.

6. Why is it important to address OBDII code B0077 Chevrolet for the Left Front/Driver Side Impact Sensor Performance promptly?

- Promptly addressing this code is crucial for ensuring the proper functioning of the vehicle's safety systems, such as airbags, in the event of a collision. Ignoring the issue can compromise occupant safety.

7. Can a DIY enthusiast fix OBDII code B0077 Chevrolet related to the Left Front/Driver Side Impact Sensor Performance?

- While some aspects of diagnosing and repairing this code may be within reach of a skilled DIY enthusiast, it is recommended to consult a professional technician for accurate diagnosis and proper repair to ensure safety.

8. How much does it typically cost to repair OBDII code B0077 Chevrolet for the Left Front/Driver Side Impact Sensor Performance?

- The cost of repair can vary depending on the specific cause of the issue, the labor rates in your area, and whether any parts need replacement. It is advisable to obtain estimates from reputable repair shops.

9. Are there any recalls or technical service bulletins related to OBDII code B0077 Chevrolet for the Left Front/Driver Side Impact Sensor Performance?

- It is advisable to check with Chevrolet or a qualified dealership for any recalls or technical service bulletins related to this specific OBDII code, as there may be relevant information or remedies available.

10. How can I prevent issues with the Left Front/Driver Side Impact Sensor triggering OBDII code B0077 Chevrolet in my Chevrolet vehicle?

- Regular maintenance and inspections, avoiding impacts to the sensor area, and addressing any warning lights promptly can help prevent issues with the Left Front/Driver Side Impact Sensor triggering this code.