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Engine-Codes – GMC – P2473 GMC

P2473 GMC Code - Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4

Quick Answer

The P2473 diagnostic trouble code for GMC vehicles indicates an issue with the Exhaust Gas Temperature Sensor Circuit for Bank 2 Sensor 4. Common causes include Faulty Exhaust Gas Temperature Sensor, Damaged wiring or connectors, Malfunctioning ECM. 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
P2473 GMC indicates Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4.
Common causes
Common causes include Faulty Exhaust Gas Temperature Sensor, Damaged wiring or connectors, Malfunctioning ECM.
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 09, 2024
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Code P2473 GMC Description

The P2473 diagnostic trouble code for GMC vehicles indicates an issue with the Exhaust Gas Temperature Sensor Circuit for Bank 2 Sensor 4. This sensor is responsible for monitoring the exhaust gas temperature after it has passed through the catalytic converter on the second bank of cylinders in the engine. The data collected by this sensor is crucial for the engine control module (ECM) to adjust fuel delivery and optimize engine performance.

OBDII Code P2473 GMC - Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4
P2473 GMC Code - Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4

Common Causes of P2473 GMC

  1. Faulty Exhaust Gas Temperature Sensor
  2. Damaged wiring or connectors
  3. Malfunctioning ECM
  4. Issues with the catalytic converter
  5. Exhaust system leaks

Symptoms of P2473 GMC

  1. Decreased fuel efficiency
  2. Reduced power output
  3. Rough idling or engine misfires
  4. Check Engine Light illuminated
  5. Increased emissions

How to Fix P2473 GMC

  1. Use an OBD-II scanner to confirm the P2473 code and identify the specific sensor location.
  2. Inspect the sensor, wiring, and connectors for any visible damage or corrosion.
  3. Test the sensor's resistance and voltage output to determine if it is functioning correctly.
  4. Replace the Exhaust Gas Temperature Sensor if it is faulty.
  5. Clear the error codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2473 GMC

The typical repair costs for resolving the P2473 code can vary depending on the specific cause of the issue and the cost of parts and labor. In general, replacing the Exhaust Gas Temperature Sensor can cost between $100 and $300, including parts and labor. Additional repairs, such as fixing wiring or connector issues, may increase the total cost. It is advisable to consult with a qualified mechanic or auto repair shop for a more precise estimate based on the individual circumstances of the vehicle.

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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.

Frequently Asked Questions about P2473 GMC Code

1. What are the common symptoms of OBDII code P2473 GMC?

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P2473 GMC indicate?

- This code indicates a problem with the exhaust gas temperature sensor circuit in Bank 2 Sensor 4 of the vehicle.

3. What are the possible causes of OBDII code P2473 GMC?

- Possible causes include a faulty exhaust gas temperature sensor, wiring issues, poor electrical connections, or a failed sensor module.

4. How can I diagnose the OBDII code P2473 GMC?

- Diagnosis involves using an OBDII scanner to retrieve the trouble codes, inspecting the exhaust gas temperature sensor and its wiring, and testing the sensor's functionality.

5. Can I still drive my vehicle with OBDII code P2473 GMC?

- It is generally not recommended to drive your vehicle with this code present to prevent potential damage to the engine and emissions system.

6. How can I repair OBDII code P2473 GMC?

- Repair may involve replacing the faulty exhaust gas temperature sensor, repairing damaged wiring, ensuring proper electrical connections, or replacing the sensor module.

7. Are there any DIY tips for fixing OBDII code P2473 GMC?

- DIY tips include checking for loose or damaged wiring, cleaning electrical connections, and following a service manual for sensor replacement.

8. How critical is it to address OBDII code P2473 GMC promptly?

- It is important to address this code promptly to prevent further damage to the engine, ensure optimal fuel efficiency, and maintain proper emissions levels.

9. Can a mechanic help with diagnosing and repairing OBDII code P2473 GMC?

- Yes, a qualified mechanic can efficiently diagnose and repair OBDII code P2473 GMC using specialized tools and expertise.

10. How can I prevent OBDII code P2473 GMC from recurring in the future?

- Regular maintenance, including checking the exhaust gas temperature sensor and its wiring, can help prevent the recurrence of OBDII code P2473 GMC.

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