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Engine-Codes – GMC – P2033 GMC

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

Quick Answer

The P2033 GMC code indicates a problem with the Exhaust Gas Temperature Sensor 2 circuit in the vehicle, specifically that the voltage is reading too high. Common causes include Faulty Exhaust Gas Temperature Sensor 2, Damaged wiring or connectors, Malfunctioning engine control module. 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 GMC indicates Exhaust Gas Temperature Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty Exhaust Gas Temperature Sensor 2, Damaged wiring or connectors, Malfunctioning engine control module.
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 09, 2024
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Code P2033 GMC Description

The P2033 GMC code indicates a problem with the Exhaust Gas Temperature Sensor 2 circuit in the vehicle, specifically that the voltage is reading too high. This sensor is responsible for monitoring the exhaust gas temperature and providing crucial data to the engine control module to ensure optimal performance and emissions. When the voltage is too high, it can lead to incorrect fuel management, potentially causing issues with engine performance, fuel efficiency, and emissions.

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

Common Causes of P2033 GMC

  1. Faulty Exhaust Gas Temperature Sensor 2
  2. Damaged wiring or connectors
  3. Malfunctioning engine control module
  4. Exhaust system leak
  5. Extreme driving conditions leading to sensor malfunction

Symptoms of P2033 GMC

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

How to Fix P2033 GMC

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific fault code and confirm the high voltage reading from the Exhaust Gas Temperature Sensor 2.
  2. Inspect the sensor, wiring, and connectors for any visible damage or corrosion. Replace any components that appear faulty.
  3. Test the sensor's output voltage using a multimeter to ensure it is within the manufacturer's specifications. Replace the sensor if necessary.
  4. Clear the fault code from the engine control module's memory using the diagnostic scanner.
  5. Test drive the vehicle to ensure the issue has been resolved and the Check Engine light does not reappear.

Cost to Fix P2033 GMC

The cost of repairing a P2033 GMC code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, replacing a faulty Exhaust Gas Temperature Sensor 2 can cost between $100 and $200 for the part alone. Labor costs can range from $80 to $150 per hour, and the total repair bill may amount to $200-$400 or more. It's recommended to consult with a local auto repair shop for a more accurate estimate based on your vehicle's make and model, as well as the severity of the issue.

What does this mean?

Tech Notes for P2033 GMC

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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Information for Specific GMC Models

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.

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