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P2032 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 2 Circuit Low Voltage

Quick Answer

The P2032 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 Circuit, specifically a low voltage condition. Common causes include Faulty EGT Sensor: The EGT sensor itself may be malfunctioning and not providing accurate data to the ECM, Wiring or Connector Issues: Damaged or corroded wiring or connectors in the sensor circuit can cause a low voltage condition, ECM Malfunction: A problem with the engine control module can also lead to incorrect sensor readings. 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
P2032 2018 GMC Sierra indicates Exhaust Gas Temperature Sensor 2 Circuit Low Voltage.
Common causes
Common causes include Faulty EGT Sensor: The EGT sensor itself may be malfunctioning and not providing accurate data to the ECM, Wiring or Connector Issues: Damaged or corroded wiring or connectors in the sensor circuit can cause a low voltage condition, ECM Malfunction: A problem with the engine control module can also lead to incorrect sensor readings.
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 12, 2024
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Code P2032 2018 GMC Sierra Description

The P2032 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 Circuit, specifically a low voltage condition. 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 injection timing and quantity, as well as to regulate exhaust gas recirculation (EGR) flow.

OBDII Code P2032 2018 GMC Sierra - Exhaust Gas Temperature Sensor 2 Circuit Low Voltage
P2032 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 2 Circuit Low Voltage

Common Causes of P2032 2018 GMC Sierra

  1. Faulty EGT Sensor: The EGT sensor itself may be malfunctioning and not providing accurate data to the ECM.
  2. Wiring or Connector Issues: Damaged or corroded wiring or connectors in the sensor circuit can cause a low voltage condition.
  3. ECM Malfunction: A problem with the engine control module can also lead to incorrect sensor readings.
  4. Exhaust System Leak: A leak in the exhaust system before the EGT sensor can affect its operation and lead to a low voltage signal.
  5. Sensor Placement: If the EGT sensor is improperly placed or installed, it may not be able to accurately measure exhaust gas temperature.

Symptoms of P2032 2018 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 Engine Performance: The vehicle may experience a decrease in power, acceleration, and overall performance.
  3. Poor Fuel Efficiency: A faulty EGT sensor can lead to incorrect fuel mixture, resulting in decreased fuel efficiency.
  4. Rough Idle: The engine may run rough or have irregular idle speed due to incorrect sensor data.
  5. Increased Emissions: The vehicle may produce higher emissions than usual due to improper exhaust gas temperature monitoring.

How to Fix P2032 2018 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scan tool to retrieve the DTC and perform further testing to pinpoint the exact cause of the low voltage condition.
  2. Inspect Wiring and Connectors: Check the wiring and connectors in the EGT sensor circuit for any damage or corrosion. Repair or replace as necessary.
  3. Test EGT Sensor: Test the EGT sensor itself to determine if it is functioning correctly. Replace the sensor if it is found to be faulty.
  4. Check ECM Functionality: Verify the operation of the engine control module to ensure that it is receiving and processing sensor data correctly.
  5. Clear DTC and Test Drive: After completing the repairs, clear the DTC from the ECM memory and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P2032 2018 GMC Sierra

The typical repair costs for addressing a P2032 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty EGT sensor can cost between $100 and $300, including parts and labor. If wiring or connectors need to be repaired or replaced, additional costs may apply. The total repair cost, including diagnostic time and labor rates, can range from $200 to $500 or more. It is advisable to consult with a trusted auto repair shop to get an accurate estimate based on your vehicle's make and model, as well as the local labor rates in your area.

What does this mean?

Tech Notes for P2032 2018 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 P2032 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2032 on a 2018 GMC Sierra related to the Exhaust Gas Temperature Sensor 2 Circuit Low Voltage?

The common symptoms include poor engine performance, decreased fuel efficiency, and potential illumination of the Check Engine Light.

2. What could be the possible causes of OBDII code P2032 on a 2018 GMC Sierra?

Possible causes of this code can include a faulty exhaust gas temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's power supply.

3. How can I diagnose the Exhaust Gas Temperature Sensor 2 Circuit Low Voltage issue on my 2018 GMC Sierra?

You can diagnose this issue by using an OBDII scanner to retrieve the trouble code, inspecting the sensor and its wiring for any visible damage, and testing the sensor's resistance and voltage output.

4. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P2032 indicating a low voltage from the Exhaust Gas Temperature Sensor 2 Circuit?

It is not recommended to drive the vehicle with this code present, as it can lead to potential engine damage and decreased performance. It's best to address the issue promptly.

5. How can I repair OBDII code P2032 on my 2018 GMC Sierra?

To repair this code, you may need to replace the faulty exhaust gas temperature sensor, repair any damaged wiring or connectors, and clear the trouble code from the vehicle's computer using an OBDII scanner.

6. Can a DIY enthusiast fix the Exhaust Gas Temperature Sensor 2 Circuit Low Voltage issue on a 2018 GMC Sierra?

While some experienced DIY enthusiasts may be able to diagnose and replace the sensor themselves, it's recommended to consult a professional mechanic for accurate diagnosis and repair of this issue.

7. Are there any preventive maintenance tips to avoid OBDII code P2032 on a 2018 GMC Sierra in the future?

Regularly inspecting the exhaust gas temperature sensor, keeping up with routine vehicle maintenance, and avoiding harsh driving conditions can help prevent issues related to this trouble code.

8. How much does it typically cost to repair OBDII code P2032 on a 2018 GMC Sierra at a dealership or auto repair shop?

The cost of repairing this code can vary depending on the extent of the damage and parts needed, but it could range from $150 to $400 at a dealership or auto repair shop.

9. Can a malfunctioning Exhaust Gas Temperature Sensor affect the emissions of my 2018 GMC Sierra?

Yes, a malfunctioning exhaust gas temperature sensor can affect the vehicle's emissions, potentially causing it to produce higher levels of harmful pollutants.

10. Will resetting the trouble code resolve OBDII code P2032 on a 2018 GMC Sierra permanently?

Simply resetting the trouble code may temporarily clear the Check Engine Light, but if the underlying issue with the Exhaust Gas Temperature Sensor 2 Circuit Low Voltage is not addressed, the code is likely to reappear.

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