AutoCodes – GMC – P2033 2018 GMC Sierra

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

Quick Answer

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 2, Exhaust Gas Temperature Sensor 2 harness is open or shorted, Exhaust Gas Temperature Sensor 2 circuit poor electrical connection. 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 Exhaust Gas Temperature Sensor (EGTS) 2, Exhaust Gas Temperature Sensor 2 harness is open or shorted, Exhaust Gas Temperature Sensor 2 circuit poor electrical connection.
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.

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Code Popularity 245

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 03, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2033 2018 GMC Sierra Description

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Exhaust temperature sensor 1 is the first exhaust temperature sensor in the exhaust system, the following exhaust temperature sensors are counted upward from the engine outlet to the exhaust system end. The Engine Control Module (ECM) supplies 5 V to the exhaust gas temperature signal circuit and supplies a ground to the low reference circuit. The exhaust gas temperature sensor temperature information is used by the ECM during the exhaust gas particulate filter cleaning process. The Diagnostic Trouble Code (DTC) will ve set when the ECM detects that the exhaust gas temperature sensor is greater than 900 Ω for greater than 2 s.

OBDII Code P2033 2018 GMC Sierra - Exhaust Gas Temperature Sensor 2 Circuit High Voltage - AutoCodes.com — P2033 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2033 2018 GMC Sierra?

Faulty Exhaust Gas Temperature Sensor (EGTS) 2
Exhaust Gas Temperature Sensor 2 harness is open or shorted
Exhaust Gas Temperature Sensor 2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2033 2018 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2033 2018 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2033 2018 GMC Sierra code?

Need more information on how to fix the P2033 2018 GMC Sierra code? Get Access to Factory Service Manuals

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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.