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P2033 2015 GMC Sierra Code - Exhaust Gas Temperature Sensor 2 Circuit High Voltage

Quick Answer

The P2033 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 Circuit, specifically a high voltage reading. Common causes include Faulty EGT Sensor: The most common cause of this code is a malfunctioning EGT sensor, which may be sending incorrect voltage readings to the ECM, Wiring Issues: Damaged or corroded wiring connections to the EGT sensor can cause high voltage readings, Exhaust System Leaks: Leaks in the exhaust system can lead to higher exhaust gas temperatures, triggering the code. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P2033 2015 GMC Sierra indicates Exhaust Gas Temperature Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty EGT Sensor: The most common cause of this code is a malfunctioning EGT sensor, which may be sending incorrect voltage readings to the ECM, Wiring Issues: Damaged or corroded wiring connections to the EGT sensor can cause high voltage readings, Exhaust System Leaks: Leaks in the exhaust system can lead to higher exhaust gas temperatures, triggering the code.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P2033 2015 GMC Sierra Description

The P2033 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 Circuit, specifically a high voltage reading. The EGT sensor is responsible for monitoring the temperature of the exhaust gases leaving the engine. This information is crucial for the engine control module (ECM) to adjust fuel delivery and timing to optimize performance and emissions.

OBDII Code P2033 2015 GMC Sierra - Exhaust Gas Temperature Sensor 2 Circuit High Voltage
P2033 2015 GMC Sierra Code - Exhaust Gas Temperature Sensor 2 Circuit High Voltage

Common Causes of P2033 2015 GMC Sierra

  1. Faulty EGT Sensor: The most common cause of this code is a malfunctioning EGT sensor, which may be sending incorrect voltage readings to the ECM.
  2. Wiring Issues: Damaged or corroded wiring connections to the EGT sensor can cause high voltage readings.
  3. Exhaust System Leaks: Leaks in the exhaust system can lead to higher exhaust gas temperatures, triggering the code.
  4. ECM Malfunction: A malfunctioning ECM may not be properly interpreting the sensor data, leading to high voltage readings.
  5. Exhaust Gas Recirculation (EGR) System Issues: Problems with the EGR system can also cause high exhaust gas temperatures, triggering the code.

Symptoms of P2033 2015 GMC Sierra

  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 Fuel Efficiency: High exhaust gas temperatures can lead to inefficient combustion, resulting in decreased fuel efficiency.
  3. Loss of Power: The engine may experience a loss of power or acceleration due to incorrect fuel delivery.
  4. Rough Idle: The vehicle may exhibit a rough idle or hesitation when accelerating.
  5. Increased Emissions: The vehicle may fail emissions tests due to the high exhaust gas temperatures affecting emissions control systems.

How to Fix P2033 2015 GMC Sierra

  1. Diagnose the Issue: Use a scan tool to retrieve the DTC and perform a thorough inspection of the EGT sensor, wiring, and exhaust system for any visible damage.
  2. Replace EGT Sensor: If the sensor is faulty, replace it with a new one following the manufacturer's guidelines.
  3. Repair Wiring: Repair or replace any damaged wiring connections to ensure proper voltage readings.
  4. Check Exhaust System: Inspect the exhaust system for leaks and repair as necessary to prevent high exhaust gas temperatures.
  5. Reset ECM: Clear the DTC and reset the ECM to ensure the code does not reappear after repairs are completed.

Cost to Fix P2033 2015 GMC Sierra

The cost of repairing a P2033 code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. Generally, the cost of a new EGT sensor ranges from $50 to $150, while labor costs can range from $80 to $150 per hour. Therefore, the total repair cost can range from $150 to $400 or more, depending on the extent of the repairs needed. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your specific vehicle and location.

What does this mean?

Tech Notes for P2033 2015 GMC Sierra

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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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 P2033 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P2033 on a 2015 GMC Sierra?

The common symptoms of code P2033 include the check engine light illuminating on the dashboard, reduced fuel efficiency, and potential misfires or rough idling.

2. What does the Exhaust Gas Temperature Sensor 2 Circuit High Voltage mean in relation to code P2033 on a 2015 GMC Sierra?

The code P2033 indicates that the exhaust gas temperature sensor 2 circuit is detecting a higher than normal voltage, which can result in incorrect readings and potential engine performance issues.

3. What are the possible causes of OBDII code P2033 on a 2015 GMC Sierra?

Possible causes of code P2033 include a faulty exhaust gas temperature sensor, damaged wiring or connectors in the sensor circuit, exhaust system leaks, or issues with the engine's computer system.

4. How can I diagnose the Exhaust Gas Temperature Sensor 2 Circuit High Voltage issue on my 2015 GMC Sierra?

Diagnosing code P2033 may involve visually inspecting the sensor and its wiring for any visible damage, testing the sensor's resistance, checking for exhaust leaks, and using a diagnostic scanner to read live data from the sensor.

5. Can I continue driving my 2015 GMC Sierra with OBDII code P2033?

It is not recommended to drive your vehicle with a persistent check engine light or code P2033, as it can lead to further damage to the engine or emissions system. It's best to address the issue promptly.

6. How can I repair OBDII code P2033 on my 2015 GMC Sierra?

Repairing code P2033 may involve replacing the exhaust gas temperature sensor 2, repairing damaged wiring or connectors, fixing any exhaust leaks, and clearing the code with a diagnostic scanner.

7. Is it possible to reset OBDII code P2033 on a 2015 GMC Sierra without fixing the underlying issue?

While you can clear the code temporarily with a diagnostic scanner, the check engine light is likely to reappear if the root cause of the high voltage in the exhaust gas temperature sensor circuit is not addressed.

8. Will OBDII code P2033 on a 2015 GMC Sierra affect the vehicle's emissions?

Yes, code P2033 can affect the vehicle's emissions by causing incorrect readings from the exhaust gas temperature sensor, potentially leading to increased emissions and failing emissions tests.

9. Can extreme weather conditions impact the occurrence of code P2033 on a 2015 GMC Sierra?

Extreme weather conditions like very high or very low temperatures can potentially affect the exhaust gas temperature sensor's performance and lead to the triggering of code P2033 in some cases.

10. How long does it typically take to repair OBDII code P2033 on a 2015 GMC Sierra?

The repair time for code P2033 can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a day to diagnose and repair the problem.

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