What is the 00149 DTC Code?

The 00149 DTC (Diagnostic Trouble Code) is a specific code that indicates a fault or issue within the vehicle’s onboard diagnostic system. DTC codes are alphanumeric codes, often consisting of five digits, that help mechanics and technicians identify and diagnose problems in a vehicle.

When the check engine light illuminates on your vehicle’s dashboard, it typically means that there is an issue that needs attention. To identify the specific problem, a diagnostic tool is used to retrieve the DTC codes stored in the vehicle’s system. The 00149 DTC code is one such code that may be retrieved during this process.

Understanding the 00149 DTC Code

The 00149 DTC code is a generic code that is often associated with a particular system or component within the vehicle. Without additional information or context, it is difficult to determine the exact meaning of this code. However, it is essential to note that DTC codes are not standalone solutions; they simply provide a starting point for diagnosis.

When diagnosing the 00149 DTC code, it is crucial to consult the vehicle’s service manual or a reliable online resource that provides detailed information about specific codes. This will help you narrow down the possibilities of what may be causing the issue.

Common Causes of the 00149 DTC Code

While the exact cause of the 00149 DTC code may vary depending on the make and model of the vehicle, there are some common causes that could trigger this specific code. These causes may include:

  1. Intake Air Temperature Sensor Fault: The intake air temperature sensor plays a crucial role in determining the air density entering the engine. If this sensor malfunctions or provides erroneous readings, it can trigger the 00149 DTC code.

  2. Faulty Mass Airflow Sensor: The mass airflow sensor measures the amount of air entering the engine and provides crucial information for fuel delivery. If this sensor is faulty or not functioning correctly, it can lead to the 00149 DTC code.

  3. Electrical Connectivity Issues: Poor electrical connections, wiring problems, or loose connections can also trigger the 00149 DTC code. It is essential to inspect the wiring and connections to rule out this potential cause.

  4. Faulty Engine Control Module: The engine control module (ECM), also known as the engine control unit (ECU), is responsible for managing various engine functions. A malfunctioning ECM can produce the 00149 DTC code.

Diagnosing and Resolving the 00149 DTC Code

Diagnosing and resolving the 00149 DTC code can be a challenging task, often requiring the assistance of a professional mechanic or technician. However, here are some general steps that can help guide the process:

  1. Retrieve and Document the Code: Use a diagnostic tool to retrieve the 00149 DTC code from the vehicle’s onboard diagnostic system. Take note of any other accompanying codes to gain a comprehensive understanding of the issue.

  2. Inspect Related Components: Check the intake air temperature sensor, mass airflow sensor, and their associated wiring and connectors for any visible signs of damage or faults. Repair or replace any faulty components as necessary.

  3. Clear the Code: After identifying and addressing the underlying issue, use the diagnostic tool to clear the 00149 DTC code from the system. This will reset the check engine light and allow you to monitor if the problem reoccurs.

  4. Test Drive and Monitor: Take the vehicle for a test drive to ensure that the issue has been resolved. Monitor the vehicle for any abnormal behaviors or the reoccurrence of the 00149 DTC code. If the problem persists, it may require further diagnosis or professional assistance.

Frequently Asked Questions (FAQs)

Q1. Can I drive my vehicle with the 00149 DTC code?

A1. It is generally not recommended to drive your vehicle with the check engine light illuminated. While the severity of the underlying issue may vary, continuing to drive can potentially cause further damage or lead to decreased performance. It is best to have the problem diagnosed and resolved as soon as possible.

Q2. Can a loose fuel cap cause the 00149 DTC code?

A2. While a loose fuel cap can trigger certain DTC codes, it is unlikely to be the cause of the 00149 DTC code specifically. However, it is always a good idea to ensure that the fuel cap is securely fastened to prevent any potential issues.

Q3. Can I reset the 00149 DTC code myself?

A3. Yes, you can reset the 00149 DTC code yourself using a diagnostic tool. However, it is important to note that simply clearing the code will not resolve the underlying issue causing the code to appear. If the problem persists, it is recommended to seek professional assistance for proper diagnosis and repair.


The 00149 DTC code signifies a fault or issue within the vehicle’s diagnostic system. While the specific meaning of this code may require further investigation, it is essential to address any illuminated check engine lights promptly. By diagnosing and resolving the underlying problem, you can restore the proper functioning of your vehicle and ensure its longevity and performance 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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