B1997 DTC Code: Causes, Symptoms, and Solutions


In the world of automotive diagnostics, DTC (Diagnostic Trouble Code) plays a crucial role in identifying and troubleshooting various issues in a vehicle’s electronic system. One such code, B1997, is known for causing headaches among vehicle owners and technicians alike. In this comprehensive article, we will delve deep into the B1997 DTC code, exploring its causes, symptoms, and potential solutions.

Understanding the B1997 DTC Code

The B1997 DTC code specifically relates to a problem in the vehicle’s supplemental restraint system (SRS). The SRS is responsible for ensuring the safety of occupants by controlling the deployment of airbags during a collision. When this code appears, it indicates a fault in the SRS, which needs immediate attention for proper functioning.

Common Causes of the B1997 DTC Code

When diagnosing the root cause of the B1997 DTC code, several factors could be at play. Here are some of the most common causes associated with this code:

1. Faulty SRS Control Module

A faulty SRS control module can trigger the B1997 DTC code. This module is responsible for receiving and interpreting signals from various sensors within the SRS system. If it malfunctions, false signals may be sent, resulting in the code being triggered.

2. Damaged Wiring or Connectors

Wiring harnesses and connectors can become damaged due to external factors like accidents, corrosion, or wear and tear. When the wiring or connectors responsible for transmitting signals within the SRS system get compromised, it can lead to the appearance of the B1997 DTC code.

3. Sensor Malfunction

Sensors within the SRS system are essential for detecting various parameters, such as impact force and seat occupancy. If any of these sensors malfunction or fail, they can send erroneous signals to the SRS control module, causing it to trigger the B1997 DTC code.

Symptoms of the B1997 DTC Code

When the B1997 DTC code is present, the vehicle’s airbag system might be affected. Here are some common symptoms that may indicate the presence of this code:

  • Illuminated Airbag Warning Light: The airbag warning light on the dashboard will stay lit, indicating a problem with the SRS system.
  • Disabled Airbags: In some cases, the engine control unit may deactivate the airbag system entirely to prevent potential hazards. This, in turn, puts the safety of occupants at risk during a collision.

Diagnosing and Solving the B1997 DTC Code

Proper diagnosis and resolution of the B1997 DTC code require expertise and the use of specialized diagnostics tools. However, here are a few steps that technicians may take to troubleshoot and resolve the issue:

  1. Step 1: Scan for DTC Codes: Using a compatible diagnostic tool, retrieve and analyze all DTC codes stored in the vehicle’s electronic control module (ECM). This step will help identify any additional codes present alongside the B1997 code, providing a more accurate diagnosis.

  2. Step 2: Inspect Wiring and Connectors: Thoroughly examine the wiring harnesses and connectors related to the SRS system. Look for visible signs of damage, such as frayed wires, loose connectors, or corrosion. Repair or replace damaged components as necessary.

  3. Step 3: Test SRS Sensors: Perform comprehensive tests on all sensors within the SRS system to ensure they are functioning properly. This may involve checking resistance, voltage output, or using simulation tools to simulate different driving conditions.

  4. Step 4: Check SRS Control Module: Test the SRS control module for any internal faults or malfunctions. If necessary, replace the module and reprogram it according to the manufacturer’s instructions.

  5. Step 5: Clear the DTC Code: After addressing the root cause of the B1997 DTC code, use the diagnostic tool to clear the code from the ECM’s memory. Verify that the code does not reappear during subsequent tests or driving cycles.

Frequently Asked Questions (FAQs):

Q1: Can I drive my vehicle with the B1997 DTC code?

A1: While it may be physically possible to drive with the B1997 DTC code, it is highly advised against doing so. This code indicates a problem with the airbag system, which is a critical safety feature. It is always recommended to have the issue diagnosed and resolved by a qualified technician before operating the vehicle.

Q2: How much does it cost to fix the B1997 DTC code?

A2: The cost of fixing the B1997 DTC code can vary depending on the root cause of the issue and the labor rates of the repairing facility. Repairing or replacing damaged wiring and connectors might cost around $100-$300, while replacing the SRS control module could range from $300 to $800. Additional costs for diagnostic services or sensor replacements may also apply.

Q3: Can I reset the B1997 DTC code using a generic OBD-II scanner?

A3: No, a generic OBD-II scanner typically cannot clear the B1997 DTC code or perform advanced functions specific to the SRS system. To properly diagnose and reset this code, you will need an advanced diagnostic tool capable of interfacing with the SRS control module and performing specialized functions.


The B1997 DTC code can be a cause for concern among vehicle owners due to its association with the SRS system. By understanding the potential causes, symptoms, and diagnostic steps involved, you are better equipped to address the issue promptly. Remember, it is always recommended to consult a qualified automotive technician for accurate diagnosis and resolution of the B1997 DTC code for optimal safety on the road.

About author


Meet Sam Mitchell, your experienced and reliable guide in the complex world of car fault codes. With a robust career spanning over 15 years as a professional car mechanic, John has the skills, knowledge, and practical experience to help you navigate car fault issues with confidence.


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