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Engine-Codes – Generic – P0549

P0549 Code - Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1

Quick Answer

The P0549 diagnostic trouble code indicates a problem with the Exhaust Gas Temperature (EGT) Sensor Circuit High for Bank 2 Sensor 1. Common causes include Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, sending incorrect signals to the ECM, Wiring Issues: Damaged or corroded wiring connections between the EGT sensor and the ECM can cause circuit high readings, Exhaust System Leaks: Leaks in the exhaust system before the EGT sensor can lead to false high temperature readings. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P0549 indicates Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1.
Common causes
Common causes include Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, sending incorrect signals to the ECM, Wiring Issues: Damaged or corroded wiring connections between the EGT sensor and the ECM can cause circuit high readings, Exhaust System Leaks: Leaks in the exhaust system before the EGT sensor can lead to false high temperature readings.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P0549 Description

The P0549 diagnostic trouble code indicates a problem with the Exhaust Gas Temperature (EGT) Sensor Circuit High for Bank 2 Sensor 1. This sensor is responsible for monitoring the exhaust gas temperature before it enters the catalytic converter. The EGT sensor provides crucial data to the engine control module (ECM) to adjust fuel delivery and optimize combustion efficiency.

OBDII Code P0549 - Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
P0549 Code - Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1

Common Causes of P0549

  1. Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, sending incorrect signals to the ECM.
  2. Wiring Issues: Damaged or corroded wiring connections between the EGT sensor and the ECM can cause circuit high readings.
  3. Exhaust System Leaks: Leaks in the exhaust system before the EGT sensor can lead to false high temperature readings.
  4. ECM Malfunction: A malfunctioning ECM may not be interpreting the EGT sensor data correctly, leading to the circuit high code.

Symptoms of P0549

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Engine Performance: The vehicle may experience a decrease in power and acceleration due to incorrect fuel delivery.
  3. Increased Emissions: High exhaust gas temperature can lead to higher emissions output, potentially causing the vehicle to fail emissions tests.
  4. Rough Idle: The engine may run rough or have an irregular idle when the EGT sensor circuit is malfunctioning.

How to Fix P0549

  1. Diagnostic Scan: Use a diagnostic scanner to retrieve the specific trouble code and confirm the issue with the EGT sensor circuit.
  2. Inspect Wiring: Check the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Replace EGT Sensor: If the sensor is faulty, replace it with a new one compatible with your vehicle's make and model.
  4. Clear Codes: After making the necessary repairs, clear the trouble codes from the ECM memory to reset the system.
  5. Test Drive: Take the vehicle for a test drive to ensure that the check engine light does not reappear and that the engine performance has improved.

Cost to Fix P0549

The cost of repairing a P0549 code can vary depending on the specific cause of the issue and the vehicle's make and model. On average, the parts for an EGT sensor replacement can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue may fall between $150 and $500. It's important to note that labor rates and part prices can vary significantly based on location and the repair shop's pricing structure. It's recommended to obtain quotes from multiple auto repair shops to get the most accurate estimate for your specific situation.

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Code P0549 Information for Specific Makes

  • P0549 Chevrolet — Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
  • P0549 Dodge — Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
  • P0549 Ford — Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
  • P0549 GMC — Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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