P0547 DTC Code: Understanding the Meaning and Troubleshooting Process


In the world of automotive diagnostics, understanding various Diagnostic Trouble Codes (DTC) is crucial for identifying and resolving issues. One such code is P0547. In this article, we will dive deep into the P0547 DTC code, exploring its meaning, potential causes, and steps to troubleshoot it effectively.

Understanding the P0547 DTC Code

The P0547 DTC code specifically relates to an issue with the Exhaust Gas Temperature (EGT) sensor circuit, Bank 2. This code is primarily found in vehicles equipped with a diesel engine, as EGT sensors are more commonly used in diesel engines to monitor and regulate exhaust gas temperatures.

Potential Causes of the P0547 DTC Code

Several factors can trigger the P0547 DTC code, including:

  1. Faulty EGT Sensor: The most common cause is a malfunctioning EGT sensor itself. Over time, these sensors may become worn out, damaged, or simply fail to function correctly, leading to the P0547 code.
  2. Electrical Issues: Wiring problems, such as frayed or disconnected wires, loose connections, or damaged harnesses, can disrupt the EGT sensor circuit and trigger the DTC code.
  3. Defective Powertrain Control Module (PCM): In some cases, a faulty PCM can misinterpret the signals received from the EGT sensor, causing the P0547 code to be stored.

Troubleshooting the P0547 DTC Code

Resolving the P0547 DTC code involves a systematic troubleshooting process. Here’s a step-by-step guide to help diagnose and resolve the issue:

Step 1: Visual Inspection and Preliminary Checks

Start by inspecting the EGT sensor and its wiring for any visible signs of damage or loose connections. Be sure to examine the Bank 2 sensor specifically. Additionally, check other nearby sensors, connectors, and wiring to rule out any potential issues.

Step 2: Perform a Sensor Resistance Test

Using a multimeter, conduct a resistance test on the EGT sensor. Compare the readings obtained with the manufacturer’s specifications to determine if the sensor is within the acceptable range. If the resistance is significantly different or infinite, it indicates a faulty sensor, requiring replacement.

Step 3: Check the Wiring and Connectors

Thoroughly inspect the wiring and connectors associated with the EGT sensor. Look for any signs of wear, corrosion, or damage. Repair or replace any compromised components as necessary to restore proper connectivity.

Step 4: Scan for Additional DTC Codes

Using an OBD-II scanner, perform a comprehensive scan of the vehicle’s computer system. Check for any additional DTC codes that may be stored, as they might provide valuable information related to the P0547 code. Address all detected codes accordingly during the troubleshooting process.

Step 5: Inspect the PCM

While relatively uncommon, a defective PCM can contribute to the P0547 code issue. Consider consulting a qualified mechanic or technician to evaluate the PCM thoroughly. They can perform necessary checks, including harness continuity tests and PCM component evaluations, to determine if it requires replacement.

Step 6: Clearing the Code

After resolving the underlying issue, use a suitable scan tool to clear the P0547 DTC code from the vehicle’s memory. This step confirms the successful resolution of the problem. However, note that clearing the code alone without addressing the root cause will likely result in the code reappearing.

Frequently Asked Questions

Q: Can I drive my vehicle with the P0547 DTC code active?

A: It is generally recommended not to drive your vehicle with the P0547 DTC code active. Continuing to drive with a malfunctioning EGT sensor can lead to potential engine damage or poor fuel efficiency. It is advised to address the issue promptly to prevent further complications.

Q: How much does it cost to replace an EGT sensor?

A: The cost of replacing an EGT sensor can vary depending on the vehicle make and model, as well as the labor rates of the repair shop. On average, the cost ranges between $150 to $300, including parts and labor.

Q: Can I troubleshoot the P0547 DTC code myself, or should I consult a professional?

A: While some basic troubleshooting steps can be performed by vehicle owners, diagnosing and resolving the P0547 code might require specialized knowledge, tools, and technical expertise. It is often recommended to consult a qualified mechanic or technician to ensure an accurate diagnosis and a proper resolution of the issue.


The P0547 DTC code in vehicles equipped with a diesel engine indicates a problem within the Exhaust Gas Temperature (EGT) sensor circuit, Bank 2. By following a systematic troubleshooting process and addressing potential causes such as faulty sensors, electrical issues, and defective PCMs, it is possible to resolve the P0547 code effectively. If unsure, it is wise to seek professional assistance to ensure the accurate diagnosis and repair, ultimately restoring your vehicle’s optimal performance.

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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