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Engine-Codes – Generic – P2481

P2481 Code - Exhaust Gas Temperature Sensor 5 Circuit Low Voltage

Quick Answer

The P2481 diagnostic trouble code (DTC) refers to a problem with the Exhaust Gas Temperature (EGT) Sensor 5 circuit, indicating that the voltage being detected by the sensor is lower than the specified threshold. Common causes include Faulty EGT Sensor 5, Wiring issues or loose connections in the EGT Sensor 5 circuit, ECM software or hardware malfunction. 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
P2481 indicates Exhaust Gas Temperature Sensor 5 Circuit Low Voltage.
Common causes
Common causes include Faulty EGT Sensor 5, Wiring issues or loose connections in the EGT Sensor 5 circuit, ECM software or hardware malfunction.
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 10, 2024
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Code P2481 Description

The P2481 diagnostic trouble code (DTC) refers to a problem with the Exhaust Gas Temperature (EGT) Sensor 5 circuit, indicating that the voltage being detected by the sensor is lower than the specified threshold. This sensor is crucial for monitoring the temperature of the exhaust gases exiting the engine, which is essential for the engine control module (ECM) to adjust fuel delivery and timing accurately.

OBDII Code P2481 - Exhaust Gas Temperature Sensor 5 Circuit Low Voltage
P2481 Code - Exhaust Gas Temperature Sensor 5 Circuit Low Voltage

Common Causes of P2481

  1. Faulty EGT Sensor 5.
  2. Wiring issues or loose connections in the EGT Sensor 5 circuit.
  3. ECM software or hardware malfunction.
  4. Exhaust system leaks or restrictions.
  5. Extreme operating conditions leading to sensor damage.

Symptoms of P2481

  1. Check engine light illuminated on the dashboard.
  2. Reduced engine power or acceleration.
  3. Increased fuel consumption.
  4. Rough idling or stalling.
  5. Emission-related issues, such as failed emissions test.

How to Fix P2481

  1. Begin by verifying the DTC using an OBD-II scanner and confirming the symptoms associated with the P2481 code.
  2. Inspect the EGT Sensor 5 and its wiring for any visible damage, corrosion, or loose connections. Replace the sensor if necessary.
  3. Check the exhaust system for leaks or restrictions that could affect the sensor readings. Repair or replace any damaged components.
  4. Clear the DTC and reset the ECM to see if the code reappears. Test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying ECM issues or more complex wiring faults.

Cost to Fix P2481

The typical repair costs for addressing the P2481 code related to the Exhaust Gas Temperature Sensor 5 circuit low voltage can vary depending on the specific vehicle make and model, as well as the extent of the issue. On average, the parts for replacing the sensor and any necessary wiring can range from $100 to $300, while labor costs may vary between $100 to $300. Overall, the total repair cost could amount to $200 to $600. It is essential to consult with a qualified mechanic or repair shop to get an accurate estimate based on the vehicle's specific requirements and labor rates in the area.

What does this mean?

Tech Notes for P2481

After starting the engine, the exhaust gas temperature sensor temperature should rise steadily, then stabilize after the engine reaches operating temperature. Exhaust gas temperature sensors may fail intermittently while operating under extreme temperatures. Review the Freeze Frame/Failure Records to verify the failure criteria.

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Code P2481 Information for Specific Makes

  • P2481 Chevrolet — Exhaust Gas Temperature Sensor 5 Circuit Low Voltage
  • P2481 Dodge — Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 5
  • P2481 Ford — Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 5
  • P2481 GMC — Exhaust Gas Temperature Sensor 5 Circuit Low Voltage
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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