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P2033 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 2 Circuit High Voltage

Quick Answer

The P2033 diagnostic trouble code indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 circuit in a 2018 GMC Sierra. Common causes include Faulty EGT sensor, Wiring or connector issues in the sensor circuit, Exhaust leaks near the sensor. 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 2018 GMC Sierra indicates Exhaust Gas Temperature Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty EGT sensor, Wiring or connector issues in the sensor circuit, Exhaust leaks near the sensor.
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 Aug 19, 2024
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Code P2033 2018 GMC Sierra Description

The P2033 diagnostic trouble code indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 circuit in a 2018 GMC Sierra. Specifically, it points to a high voltage condition in the sensor circuit. The EGT sensor is responsible for monitoring the exhaust gas temperature, which is crucial for the engine and emissions system's optimal performance. When the sensor detects a high voltage, it suggests that the exhaust gas temperature is higher than expected, which can lead to various issues.

OBDII Code P2033 2018 GMC Sierra - Exhaust Gas Temperature Sensor 2 Circuit High Voltage
P2033 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 2 Circuit High Voltage

Common Causes of P2033 2018 GMC Sierra

  1. Faulty EGT sensor
  2. Wiring or connector issues in the sensor circuit
  3. Exhaust leaks near the sensor
  4. Engine running too lean
  5. Exhaust system blockage or restriction

Symptoms of P2033 2018 GMC Sierra

  1. Check Engine Light illuminated on the dashboard
  2. Reduced engine performance or power
  3. Increased fuel consumption
  4. Rough idling or engine misfires
  5. Strong exhaust odor or smoke

How to Fix P2033 2018 GMC Sierra

  1. Diagnose the issue by using a scan tool to confirm the P2033 code and inspecting the EGT sensor and wiring for any visible damage.
  2. Replace the EGT sensor if it is found to be faulty. Ensure to install a quality OEM or aftermarket sensor to prevent future issues.
  3. Check and repair any damaged wiring or connectors in the sensor circuit.
  4. Inspect the exhaust system for leaks, blockages, or other issues that could affect the sensor's readings.
  5. Clear the trouble code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2033 2018 GMC Sierra

The typical repair costs for addressing a P2033 code in a 2018 GMC Sierra can vary depending on the specific cause of the issue. Generally, replacing the EGT sensor and addressing any related wiring or exhaust system issues can range from $200 to $500. This estimate includes parts and labor costs. However, it's essential to consider that labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P2033 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 P2033 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2033 in a 2018 GMC Sierra related to the Exhaust Gas Temperature Sensor 2 Circuit High Voltage?

The common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P2033 in a 2018 GMC Sierra indicating an issue with the Exhaust Gas Temperature Sensor 2 Circuit High Voltage?

Possible causes include a faulty exhaust gas temperature sensor, damaged wiring or connectors, issues with the sensor circuit, or a problem with the engine control module.

3. How can I diagnose OBDII code P2033 in my 2018 GMC Sierra associated with the Exhaust Gas Temperature Sensor 2 Circuit High Voltage?

Diagnosis typically involves using an OBDII scanner to retrieve the fault code, inspecting the EGT sensor and its wiring for any visible damage, and testing the sensor's resistance and voltage levels.

4. Are there any DIY repair tips for addressing OBDII code P2033 in a 2018 GMC Sierra related to the Exhaust Gas Temperature Sensor 2 Circuit High Voltage?

DIY repair tips include visually inspecting the sensor and its connections, checking for any loose or damaged wires, cleaning the sensor connectors, and resetting the fault code to see if it reoccurs.

5. Can driving with OBDII code P2033 in a 2018 GMC Sierra signaling an issue with the Exhaust Gas Temperature Sensor 2 Circuit High Voltage cause further damage?

Continued driving with this issue can potentially lead to reduced engine performance, increased emissions, and damage to other components, so it's advisable to address the problem promptly.

6. How much does it typically cost to repair OBDII code P2033 in a 2018 GMC Sierra associated with the Exhaust Gas Temperature Sensor 2 Circuit High Voltage?

The repair cost can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor at a dealership or repair shop.

7. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P2033 caused by a problem with the Exhaust Gas Temperature Sensor 2 Circuit High Voltage?

While the vehicle may still be operable, it's recommended to have the issue diagnosed and repaired as soon as possible to prevent potential long-term damage and ensure optimal engine performance.

8. Can a faulty Exhaust Gas Temperature Sensor trigger other OBDII codes in a 2018 GMC Sierra, in addition to P2033?

Yes, a malfunctioning EGT sensor can sometimes trigger related codes such as P2032 (Exhaust Gas Temperature Sensor 2 Circuit Low Voltage) or codes indicating issues with the engine's emissions system.

9. How long does it typically take to repair OBDII code P2033 in a 2018 GMC Sierra associated with the Exhaust Gas Temperature Sensor 2 Circuit High Voltage?

The repair time can vary based on the exact cause of the issue and the repair shop's workload, but it generally takes around 1 to 2 hours to diagnose and fix the problem.

10. Can resetting the check engine light temporarily resolve OBDII code P2033 in a 2018 GMC Sierra indicating a fault with the Exhaust Gas Temperature Sensor 2 Circuit High Voltage?

Resetting the check engine light may temporarily turn off the warning indicator, but if the underlying issue causing the fault code is not addressed, the light is likely to reappear once the problem is detected again.

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