Engine-CodesRAM – B1C27 RAM

B1C27 RAM Code - Left Side Seat Thorax Squib 1 Low

Quick Answer

The B1C27 diagnostic trouble code (DTC) specifically refers to the Left Side Seat Thorax Squib 1 Low. Common causes include Faulty left side seat thorax squib, Damaged wiring or connectors in the airbag system, Loose or poor connection in the circuit. 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
B1C27 RAM indicates Left Side Seat Thorax Squib 1 Low.
Common causes
Common causes include Faulty left side seat thorax squib, Damaged wiring or connectors in the airbag system, Loose or poor connection in the circuit.
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.
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code B1C27 RAM Description

The B1C27 diagnostic trouble code (DTC) specifically refers to the Left Side Seat Thorax Squib 1 Low. This code indicates a potential issue with the left side seat thorax airbag squib circuit in the vehicle. The seat thorax airbag is an important safety feature designed to protect occupants in the event of a side impact collision. The squib is a component within the airbag system that helps to deploy the airbag at the right time.

OBDII Code B1C27 RAM - Left Side Seat Thorax Squib 1 Low
B1C27 RAM Code - Left Side Seat Thorax Squib 1 Low

Common Causes of B1C27 RAM

  1. Faulty left side seat thorax squib
  2. Damaged wiring or connectors in the airbag system
  3. Loose or poor connection in the circuit
  4. Malfunctioning airbag control module
  5. Corrosion or moisture in the circuit

Symptoms of B1C27 RAM

  1. Illumination of the airbag warning light on the dashboard
  2. Failure of the seat thorax airbag to deploy in a crash
  3. Intermittent or erratic deployment of the seat thorax airbag
  4. Diagnostic trouble code stored in the vehicle's computer system

How to Fix B1C27 RAM

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scan tool to retrieve the DTC and pinpoint the problem area.
  2. Inspect the wiring and connectors in the left side seat thorax squib circuit for any damage or corrosion. Repair or replace any damaged components.
  3. Test the left side seat thorax squib for proper function. If it is found to be faulty, replace it with a new unit.
  4. Clear the DTC from the vehicle's computer system using the diagnostic scan tool.
  5. Perform a test to verify that the issue has been resolved and that the seat thorax airbag deploys correctly.

Cost to Fix B1C27 RAM

The cost of repairing a B1C27 DTC related to the Left Side Seat Thorax Squib 1 Low can vary depending on the specific cause of the issue and the cost of parts and labor. In general, the cost of replacing a faulty squib or repairing damaged wiring could range from $200 to $500, including parts and labor. However, it is important to note that labor rates at auto repair shops can vary widely, so it is advisable to obtain a specific estimate from a qualified technician based on the vehicle's make and model, as well as the extent of the repair needed.

When is the Code Detected?

This Diagnostic Trouble Code (DTC) sets when the Occupant Restraint Controller (ORC) detects an open on the squib circuit for more than 2.5 seconds. This DTC transitions from active to stored, when the module sees a recovery from an open condition for greater than 2.5 seconds.

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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 B1C27 RAM Code

1. What does the OBDII code B1C27 RAM mean?

The B1C27 code indicates a problem with the Left Side Seat Thorax Airbag circuit, specifically a low voltage condition in Squib 1.

2. What are the common symptoms of the B1C27 code?

Symptoms include the airbag warning light staying on, a stored trouble code in the system, and possibly the left side thorax airbag being disabled.

3. What causes the B1C27 code to appear?

Common causes include damaged wiring or connectors in the airbag circuit, a faulty thorax airbag module, or issues with the clockspring or control module.

4. Can I still drive my vehicle with the B1C27 code?

Yes, but the left side thorax airbag may not deploy in the event of a collision, compromising passenger safety.

5. How do I diagnose the B1C27 code?

Diagnosis involves using a scan tool to confirm the code, inspecting wiring and connectors for damage, and testing the thorax airbag module for proper operation.

6. How can I fix the B1C27 RAM code?

Repairs may include repairing or replacing damaged wiring, reconnecting loose connectors, or replacing a faulty thorax airbag module.

7. What tools are needed to troubleshoot the B1C27 code?

You’ll need an OBDII scanner, a multimeter for electrical testing, and potentially a repair manual for wiring diagrams.

8. Is the B1C27 code covered under warranty?

It may be covered under the manufacturer’s warranty if the vehicle is still under coverage; consult your dealership for details.

9. How much does it cost to fix the B1C27 code?

Repair costs vary but can range from $100 to $500 or more, depending on whether wiring repairs or airbag module replacement is needed.

10. Can a low battery cause the B1C27 code?

Yes, a weak or low battery can sometimes cause airbag-related codes, so ensure the battery voltage is adequate before further troubleshooting.

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