17551/P1143/004419 DTC Code: Understanding and Troubleshooting


When it comes to diagnosing vehicle issues, understanding Diagnostic Trouble Codes (DTC) is crucial. One such code that often appears is the 17551/P1143/004419 DTC code. In this article, we will delve into the details of this code, its meaning, and the necessary steps to troubleshoot and resolve the associated problem. Whether you are an automotive enthusiast, a mechanic, or simply looking to understand more about your vehicle, this comprehensive guide will provide you with the required information.

Understanding the 17551/P1143/004419 DTC Code

DTC codes are standardized identifiers used by vehicles to indicate specific malfunctions. The 17551/P1143/004419 DTC code signifies a fault related to the Mass or Volume Air Flow Circuit - High Input. To comprehend this code further, let’s break it down.

  • 17551 represents the generic OBD-II code without the manufacturer-specific prefix.
  • P1143 indicates the specific fault related to the Mass or Volume Air Flow Circuit.
  • 004419 refers to the hexadecimal representation of the code in the vehicle’s memory.

By analyzing this code, we can narrow down the issue to the Mass or Volume Air Flow Circuit, specifically a high input situation. However, to rectify the problem, it is crucial to understand the root causes and potential troubleshooting steps.

Possible Causes of the 17551/P1143/004419 DTC Code

Several factors can contribute to the occurrence of the 17551/P1143/004419 DTC code. It is essential to investigate each potential cause to accurately diagnose and resolve the issue. Here are some common causes:

  1. Faulty Mass Air Flow (MAF) Sensor: The MAF sensor measures the amount of air entering the engine. A faulty MAF sensor can provide incorrect readings, leading to the high input error.

  2. Air Intake System Leaks: Leaks in the air intake system, such as cracked hoses or loose connections, can cause abnormal air pressure readings and trigger this DTC code.

  3. Clogged Air Filter: A clogged air filter limits the flow of air into the engine, resulting in irregular MAF sensor readings.

  4. Faulty Wiring or Connectors: Damaged or loose wiring, as well as faulty connectors, can disrupt the proper functioning of the MAF sensor, leading to high input readings.

  5. Issues with the Engine Control Unit (ECU): A malfunctioning ECU can send incorrect signals to the MAF sensor, resulting in the generation of this DTC code.

Troubleshooting the 17551/P1143/004419 DTC Code

Now that we have a comprehensive understanding of the 17551/P1143/004419 DTC code and its potential causes, let’s explore the troubleshooting steps to rectify the issue. Remember, these steps serve as a general guideline, and it is always recommended to consult a professional mechanic or follow vehicle-specific instructions.

  1. Inspect and Clean the MAF Sensor: Start by locating the MAF sensor, often positioned between the air filter and the throttle body. Carefully remove the sensor and visually inspect it for any dirt, dust, or debris. If necessary, use an approved MAF sensor cleaner to gently clean the sensor. Ensure it is completely dry before reinstalling it.

  2. Check for Air Intake System Leaks: Thoroughly inspect all hoses, connections, and clamps in the air intake system. Look for any signs of damage, cracks, or leaks. Tighten loose connections and replace any faulty components as needed.

  3. Replace the Air Filter: If you find an excessively dirty or clogged air filter during your inspection, replace it with a new one. A clean air filter ensures proper airflow, minimizing the chances of triggering the DTC code.

  4. Inspect Wiring and Connectors: Carefully inspect the wiring harness connected to the MAF sensor. Look for any signs of damage, loose connections, or corrosion. If any issues are detected, repair or replace the affected wiring or connectors.

  5. Verify ECU Functionality: Consult vehicle-specific documentation or use a diagnostic tool capable of communicating with the ECU to identify any potential issues. If required, consider seeking professional assistance or contacting the vehicle manufacturer for further guidance.

By following these troubleshooting steps, you can effectively tackle the 17551/P1143/004419 DTC code and successfully resolve the underlying issue related to the Mass or Volume Air Flow Circuit.

Frequently Asked Questions (FAQs)

Q1: Can the 17551/P1143/004419 DTC code cause any additional symptoms in the vehicle? A1: Yes, the most common symptoms associated with this code include reduced engine performance, rough idling, engine hesitation, and increased fuel consumption.

Q2: Can I continue driving if I encounter the 17551/P1143/004419 DTC code? A2: It is generally recommended to avoid driving the vehicle with unresolved DTC codes. While the car might still be operational, continued driving without addressing the issue could potentially cause further damage or affect engine performance.

Q3: Is it possible to reset the 17551/P1143/004419 DTC code without fixing the problem? A3: Resetting the code without addressing the underlying issue is not recommended. Although resetting may temporarily eliminate the check engine light, the code will likely reappear if the problem persists. Moreover, rectifying the actual problem is essential to maintain the overall health and performance of the vehicle.


Understanding and troubleshooting the 17551/P1143/004419 DTC code is vital to ensure the smooth operation of your vehicle’s Mass or Volume Air Flow Circuit. By comprehending the underlying causes and following the appropriate troubleshooting steps, you can successfully resolve the issue and restore optimal vehicle performance. However, if you are unsure or encounter any difficulties during the troubleshooting process, it is always wise to seek professional assistance to avoid potential complications or further damage.

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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