AutoCodes – Generic – B1877

B1877 Code - Short to Ground in Passenger Side Front Seat Cushion Squib Circuit

Quick Answer

The Front Seat Cushion Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and the Front Seat Airbag Sub-Assembly. Common causes include Faulty Front Seat Airbag Sub-Assembly (Front Seat Cushion Squib Right), Front Seat Airbag Sub-Assembly harness is open or shorted, Front Seat Airbag Sub-Assembly 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: B1877 indicates Short to Ground in Passenger Side Front Seat Cushion Squib Circuit.
Common causes: Common causes include Faulty Front Seat Airbag Sub-Assembly (Front Seat Cushion Squib Right), Front Seat Airbag Sub-Assembly harness is open or shorted, Front Seat Airbag Sub-Assembly 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 38,057

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 Dec 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1877 Description

The Front Seat Cushion Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and the Front Seat Airbag Sub-Assembly. This circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Front Seat Cushion Squib Right (RH).

OBDII Code B1877 - Short to Ground in Passenger Side Front Seat Cushion Squib Circuit - AutoCodes.com — B1877 Code - Short to Ground in Passenger Side Front Seat Cushion Squib Circuit

What does this mean?

What are the Possible Causes of the DTC B1877?

Faulty Front Seat Airbag Sub-Assembly (Front Seat Cushion Squib Right)
Front Seat Airbag Sub-Assembly harness is open or shorted
Front Seat Airbag Sub-Assembly circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1877?

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 B1877 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 B1877 code?

Need more information on how to fix the B1877 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1877 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1877 Ford — Seat Belt Driver Pretensioner Circuit Open
B1877 Lexus — Short to Ground in Passenger Side Front Seat Cushion Squib Circuit
B1877 Lincoln — Seat Belt Driver Pretensioner Circuit Open
B1877 Mazda — Seat Belt Driver Pretensioner Circuit Open
B1877 Mercury — Seat Belt Driver Pretensioner Circuit Open
B1877 Scion — Short to Ground in Passenger Side Front Seat Cushion Squib Circuit
B1877 Toyota — Short to Ground in Passenger Side Front Seat Cushion Squib Circuit

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 B1877 Code

1. What are the common symptoms of OBDII code B1877 (Short to Ground in Passenger Side Front Seat Cushion Squib Circuit)?

- The common symptoms include the airbag warning light staying illuminated on the dashboard and potential non-deployment of the passenger side airbag in the event of a collision.

2. What are the possible causes of OBDII code B1877?

- The code B1877 can be caused by a short circuit to ground in the wiring of the passenger side front seat cushion squib circuit.

3. How can I diagnose the issue related to OBDII code B1877?

- To diagnose the issue, you can use a diagnostic scan tool to read the trouble code, visually inspect the wiring and connectors for any damage, and perform continuity tests to identify the short to ground.

4. Can I drive my vehicle with OBDII code B1877?

- It is not recommended to drive the vehicle with an active code B1877, as it indicates a potential safety issue with the airbag system. It is advised to address the problem promptly.

5. What are the repair options for fixing OBDII code B1877?

- Repair options include repairing or replacing damaged wiring, fixing loose connections, or replacing the passenger side front seat cushion squib if necessary.

6. Can I reset the OBDII code B1877 without fixing the underlying issue?

- Resetting the code without addressing the underlying issue will not resolve the problem. It is important to diagnose and repair the root cause to prevent the code from reoccurring.

7. Are there any safety precautions to consider when working on the airbag system related to OBDII code B1877?

- When working on the airbag system, it is crucial to disconnect the vehicle battery and wait for at least 10 minutes to allow the system to discharge completely to avoid accidental airbag deployment.

8. How much does it typically cost to repair OBDII code B1877 at a repair shop?

- The cost of repairing OBDII code B1877 can vary depending on the extent of the damage and the labor rates of the repair shop. It is recommended to get a few quotes from different shops for comparison.

9. Can OBDII code B1877 be triggered by other issues besides a short to ground in the passenger side front seat cushion squib circuit?

- While the primary cause of B1877 is a short to ground in the specified circuit, it is possible for other underlying issues such as faulty sensors or control modules to trigger this code as well.

10. Is it possible to prevent OBDII code B1877 from occurring in the future?

- Regular maintenance checks, avoiding water damage to the airbag system components, and addressing any wiring issues promptly can help prevent OBDII code B1877 from occurring in the future.