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P2033 2016 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 2 Circuit High Voltage

Quick Answer

The P2033 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 Circuit registering high voltage. Common causes include Faulty EGT Sensor: The most common cause of this code is a malfunctioning or damaged EGT sensor, Wiring Issues: Corrosion, damage, or poor connections in the wiring harness connected to the EGT sensor can also trigger this code, ECM Malfunction: A problem with the engine control module (ECM) can cause incorrect readings from the EGT sensor, leading to the high voltage issue. 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 2016 Chevrolet Silverado 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 or damaged EGT sensor, Wiring Issues: Corrosion, damage, or poor connections in the wiring harness connected to the EGT sensor can also trigger this code, ECM Malfunction: A problem with the engine control module (ECM) can cause incorrect readings from the EGT sensor, leading to the high voltage issue.
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 15, 2024
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Code P2033 2016 Chevrolet Silverado Description

The P2033 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 Circuit registering high voltage. The EGT sensor is a crucial component in the vehicle's emissions control system, monitoring the temperature of the exhaust gases to ensure optimal performance and efficiency. When the EGT Sensor 2 Circuit detects high voltage, it means that the sensor is reading a temperature that is higher than expected, which can lead to various issues within the vehicle's systems.

OBDII Code P2033 2016 Chevrolet Silverado - Exhaust Gas Temperature Sensor 2 Circuit High Voltage
P2033 2016 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 2 Circuit High Voltage

Common Causes of P2033 2016 Chevrolet Silverado

  1. Faulty EGT Sensor: The most common cause of this code is a malfunctioning or damaged EGT sensor.
  2. Wiring Issues: Corrosion, damage, or poor connections in the wiring harness connected to the EGT sensor can also trigger this code.
  3. ECM Malfunction: A problem with the engine control module (ECM) can cause incorrect readings from the EGT sensor, leading to the high voltage issue.
  4. Exhaust System Leaks: Any leaks in the exhaust system before or after the EGT sensor can affect its readings and trigger the P2033 code.
  5. Software Update: In some cases, a software update or reflash may be required to address compatibility issues between the ECM and the EGT sensor.

Symptoms of P2033 2016 Chevrolet Silverado

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Engine Performance: The vehicle may experience a decrease in power and acceleration due to incorrect fuel delivery and timing adjustments.
  3. Increased Emissions: High voltage readings from the EGT sensor can lead to higher emissions output, potentially causing the vehicle to fail emissions tests.
  4. Rough Idle: The engine may run rough or have irregular idling patterns due to the incorrect sensor readings.
  5. Overheating: In severe cases, the engine may overheat due to the ECM's incorrect adjustments based on faulty EGT sensor data.

How to Fix P2033 2016 Chevrolet Silverado

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the EGT sensor, wiring, and ECM.
  2. Replace EGT Sensor: If the sensor is found to be faulty, replace it with a new, OEM-quality sensor compatible with the vehicle.
  3. Repair Wiring: Check the wiring harness for any damage, corrosion, or poor connections, and repair or replace as needed.
  4. Reset ECM: Clear the trouble code from the ECM's memory and reset the system to see if the issue persists.
  5. Test Drive: After completing the repairs, take the vehicle for a test drive to ensure that the check engine light does not reappear and that the engine performance is back to normal.

Cost to Fix P2033 2016 Chevrolet Silverado

The typical repair costs for addressing a P2033 code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing the EGT sensor can cost between $100 and $300, including parts and labor. If wiring repairs or an ECM reflash are needed, additional costs may apply. It's important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower prices. For a more accurate estimate, it's recommended to consult with local auto repair shops.

What does this mean?

Tech Notes for P2033 2016 Chevrolet Silverado

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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2033 on a 2016 Chevrolet Silverado?

- Common symptoms include the check engine light illuminating, reduced engine performance, and potential fuel efficiency issues.

2. What does the OBDII code P2033 in a 2016 Chevrolet Silverado indicate?

- The code P2033 indicates a high voltage in the Exhaust Gas Temperature Sensor 2 circuit.

3. What are the possible causes of OBDII code P2033 on a 2016 Chevrolet Silverado?

- Possible causes include a faulty Exhaust Gas Temperature Sensor 2, wiring issues, a damaged sensor connector, or a problem with the engine control module.

4. How can I diagnose the OBDII code P2033 on my 2016 Chevrolet Silverado?

- Diagnosis involves inspecting the sensor wiring and connector for damage, testing the sensor's resistance, and checking for proper voltage supply.

5. Can I continue driving my 2016 Chevrolet Silverado with OBDII code P2033?

- It is not recommended to drive with this code present, as it can lead to further damage to the engine or emissions system.

6. Is it possible to repair OBDII code P2033 on a 2016 Chevrolet Silverado myself?

- While some DIY enthusiasts may be able to address wiring or connector issues, replacing the Exhaust Gas Temperature Sensor 2 may require professional assistance.

7. How much does it typically cost to repair OBDII code P2033 on a 2016 Chevrolet Silverado?

- The cost of repairing this code can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

8. Are there any preventive measures to avoid OBDII code P2033 in a 2016 Chevrolet Silverado?

- Regular maintenance checks, including inspecting sensor wiring and connectors, can help prevent issues that lead to this code.

9. Will resetting the OBDII code P2033 in my 2016 Chevrolet Silverado make it go away permanently?

- Simply resetting the code may temporarily turn off the check engine light, but if the underlying issue is not resolved, the code is likely to reappear.

10. Can OBDII code P2033 on a 2016 Chevrolet Silverado cause any long-term damage if left untreated?

- Ignoring this code can potentially lead to decreased engine performance, increased emissions, and possible damage to the catalytic converter over time.

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