B1919 DTC Code: Understanding and Troubleshooting


In the automotive industry, diagnostic trouble codes (DTCs) assist technicians in identifying and troubleshooting issues with vehicles. One such code is the B1919 DTC code. In this article, we will delve into the details of the B1919 code, understand its meaning, and discuss effective troubleshooting methods to resolve the issue. So, buckle up and let’s dive in!

Understanding the B1919 DTC Code

The B1919 DTC code is an abbreviation for “Body Color Door Input Circuit Failure.” It indicates a problem in the input circuit of the body color door feature within a vehicle. This code is standard across various car manufacturers and models, making it applicable in a wide range of scenarios.

Causes of the B1919 Code

To effectively diagnose and resolve the B1919 code, it is crucial to understand its potential causes. Here are some common triggers for this code:

  1. Faulty Wiring: Damaged or short-circuited wiring can lead to an improper connection within the body color door input circuit, triggering the B1919 code.

  2. Malfunctioning Switch or Sensor: A defective door switch or sensor that is responsible for monitoring the body color door feature can cause the B1919 code to be triggered.

  3. Control Module Issues: Problems within the control module, which manages the body color door system, can contribute to the activation of the B1919 DTC code.

  4. Electrical Issues: Issues with the vehicle’s electrical system, such as blown fuses or disrupted power supply, can result in malfunctions and cause the B1919 code to appear.

Diagnosing the B1919 Code

Now that we have identified potential causes of the B1919 code, let’s explore the diagnostic process to address this issue effectively. Follow the steps below:

Step 1: Perform a Visual Inspection

Start by visually inspecting the wiring harness connected to the body color door system. Look for any signs of damage or loose connections that could trigger the B1919 code.

Step 2: Test the Door Switch

Use a multimeter to test the door switch’s continuity. Activate the switch and check whether it provides a constant flow of electrical current. Any irregular reading points towards a faulty switch.

Step 3: Check the Sensors

Examine the door sensors, ensuring they are properly installed and free from any physical damage. Test their functionality using specialized diagnostic equipment to identify and replace any malfunctioning sensors.

Step 4: Inspect the Control Module

If the previous steps don’t resolve the issue, inspect the control module responsible for managing the body color door system. Ensure it is connected correctly, and if necessary, consult the vehicle’s specific repair manual for guidance on testing and replacing the module if deemed faulty.

Resolving the B1919 Code

Once the root cause of the B1919 code has been identified, it’s time to move onto resolving the issue. Follow the appropriate steps based on your diagnosis:

  1. Wiring Repair: If damaged or loose wiring was identified, repair or replace the affected sections to establish a proper connection within the body color door input circuit.

  2. Switch or Sensor Replacement: Faulty switches or sensors should be replaced with OEM or approved aftermarket alternatives. Ensure compatibility with the vehicle’s make and model.

  3. Control Module Replacement: If the control module is at fault, replace it with a new one. Remember to program the new module to match the specific vehicle requirements.

  4. Electrical System Inspection: Conduct a thorough inspection of the vehicle’s electrical system to identify and resolve any issues, such as blown fuses or disrupted power supply, that may have contributed to the B1919 code.

Frequently Asked Questions

Q1: Can the B1919 code lead to any other issues with my vehicle?

A1: While the B1919 code itself does not directly cause other vehicle complications, an unresolved issue within the body color door system may affect its overall functionality and aesthetics.

Q2: Is it safe to drive my vehicle with the B1919 code triggered?

A2: As long as there are no other associated issues affecting the vehicle’s drivability or safety, it can generally be driven. However, it is recommended to address the B1919 code in a timely manner to prevent the problem from worsening or causing additional malfunctions.

Q3: Can I diagnose and fix the B1919 code on my own, or do I need professional help?

A3: While some DIY enthusiasts can effectively diagnose and resolve the B1919 code, it is advisable to seek professional assistance if you lack experience in automotive diagnostics. Professionals have the expertise and equipment needed to ensure accurate troubleshooting and safe repairs.


The B1919 DTC code, indicating a body color door input circuit failure, can be resolved through a systematic diagnostic process. By inspecting wiring, testing switches and sensors, and addressing control module concerns, you can effectively address the issue. Remember to prioritize safety and consider professional help if needed. Stay proactive in maintaining your vehicle to avoid any unforeseen complications down 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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