AutoCodes – Pontiac – B0077 Pontiac

B0077 Pontiac 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 Pontiac 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 1,278

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

What does this mean?

What are the Possible Causes of the DTC B0077 Pontiac?

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 Pontiac?

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 Pontiac 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 Pontiac code?

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

Need Help with the Code?

Get the B0077 Pontiac 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 Pontiac Code

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

- Common symptoms include the airbag warning light being illuminated on the dashboard, a message indicating an airbag system fault, or airbags not deploying properly in the event of a collision.

2. What are some possible causes of the B0077 OBDII code in a Pontiac?

- Possible causes include a malfunctioning left front/driver side impact sensor, damaged wiring or connectors leading to the sensor, or a problem with the airbag control module.

3. How can I diagnose the issue causing the B0077 code in my Pontiac?

- Proper diagnosis requires a scan tool capable of reading OBDII codes and accessing the airbag system. The impact sensor and associated wiring should be carefully inspected for damage or loose connections.

4. Can I drive my Pontiac with the B0077 code present?

- It is not recommended to drive the vehicle with the B0077 code active, as it indicates a potential safety issue with the airbag system. Have the problem diagnosed and repaired as soon as possible.

5. What repairs are typically needed to fix the B0077 OBDII code in a Pontiac?

- Repairs may involve replacing the left front/driver side impact sensor, repairing damaged wiring or connectors, or reprogramming the airbag control module to clear the fault code.

6. Is it safe to reset the B0077 code in my Pontiac without fixing the underlying issue?

- Resetting the code without addressing the root cause can be dangerous, as it may lead to airbag system malfunctions in the event of a collision. It is best to fix the issue before clearing the code.

7. Are there any safety precautions to take when working on the airbag system related to the B0077 code?

- It is crucial to disconnect the vehicle's battery and wait for at least 10 minutes before working on the airbag system to prevent accidental deployment. Additionally, follow manufacturer guidelines for handling airbag components.

8. Can a DIY enthusiast repair the B0077 OBDII code issue in a Pontiac?

- While some basic diagnostic steps can be taken by experienced DIYers, repairing the airbag system related to the B0077 code is best left to professionals due to safety concerns and the complexity of the system.

9. How much does it typically cost to repair the B0077 OBDII code in a Pontiac at a dealership or repair shop?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Will fixing the B0077 code in my Pontiac require reprogramming or resetting the airbag system?

- In some cases, fixing the B0077 code may require reprogramming or resetting the airbag control module to clear the fault code and ensure proper functioning of the airbag system.