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Engine-Codes – GMC – P0223 2018 GMC Sierra

P0223 2018 GMC Sierra Code - Throttle Position Sensor 2 Circuit High Voltage

Quick Answer

The P0223 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Throttle Position Sensor 2 (TPS) circuit registering high voltage. Common causes include Faulty throttle position sensor, Wiring issues such as shorts or open circuits in the TPS circuit, Corrosion or poor connections in the TPS wiring harness. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0223 2018 GMC Sierra indicates Throttle Position Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty throttle position sensor, Wiring issues such as shorts or open circuits in the TPS circuit, Corrosion or poor connections in the TPS wiring harness.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0223 2018 GMC Sierra Description

The P0223 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Throttle Position Sensor 2 (TPS) circuit registering high voltage. The throttle position sensor is a crucial component of the vehicle's electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). The ECM uses this data to determine the appropriate air-fuel mixture for optimal engine performance.

OBDII Code P0223 2018 GMC Sierra - Throttle Position Sensor 2 Circuit High Voltage
P0223 2018 GMC Sierra Code - Throttle Position Sensor 2 Circuit High Voltage

Common Causes of P0223 2018 GMC Sierra

  1. Faulty throttle position sensor
  2. Wiring issues such as shorts or open circuits in the TPS circuit
  3. Corrosion or poor connections in the TPS wiring harness
  4. ECM software or hardware issues
  5. Mechanical problems affecting the throttle body operation

Symptoms of P0223 2018 GMC Sierra

  1. Erratic idle speed
  2. Reduced engine power
  3. Poor acceleration
  4. Stalling or hesitation during acceleration
  5. Illumination of the Check Engine Light

How to Fix P0223 2018 GMC Sierra

  1. Begin by conducting a thorough inspection of the throttle position sensor and its wiring harness for any visible damage or corrosion.
  2. Use a multimeter to test the TPS 2 circuit for proper voltage readings according to manufacturer specifications.
  3. If the sensor is faulty, replace it with a new, OEM-quality throttle position sensor.
  4. Repair any damaged wiring or connectors in the TPS circuit.
  5. Clear the DTC with a scan tool and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0223 2018 GMC Sierra

The typical repair costs for addressing a P0223 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. Replacement throttle position sensors can range from $50 to $150, while labor costs at an auto repair shop may add an additional $100 to $200. Overall, the total repair cost could fall within the $150 to $350 range. However, it's essential to consider that diagnosis time and labor rates can fluctuate based on location, vehicle make and model, and the expertise of the technician. It's advisable to obtain quotes from local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0223 2018 GMC Sierra









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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 P0223 2018 GMC Sierra Code

1. What does OBDII code P0223 on a 2018 GMC Sierra indicate?

- OBDII code P0223 on a 2018 GMC Sierra indicates an issue with the Throttle Position Sensor 2 Circuit registering high voltage.

2. What are common symptoms of a Throttle Position Sensor 2 Circuit High Voltage issue?

- Common symptoms include poor engine performance, rough idling, stalling, and a decrease in fuel efficiency.

3. What are the possible causes of the Throttle Position Sensor 2 Circuit High Voltage code?

- The main causes of this code can be a faulty throttle position sensor, damaged wiring or connectors, or issues with the engine control module.

4. How can I diagnose the Throttle Position Sensor 2 Circuit High Voltage problem?

- Diagnosing this issue involves using an OBDII scanner to read the code, checking the throttle position sensor's voltage levels, and inspecting the sensor and its wiring for any visible damage.

5. Can I continue driving my 2018 GMC Sierra with the P0223 code?

- It is not recommended to continue driving with the P0223 code as it can lead to further damage to the engine and affect the vehicle's performance.

6. How is the Throttle Position Sensor 2 Circuit High Voltage issue typically repaired?

- Repairing this issue usually involves replacing the faulty throttle position sensor, repairing or replacing damaged wiring or connectors, and clearing the trouble code from the system.

7. Is it possible to reset the P0223 code on a 2018 GMC Sierra without fixing the underlying issue?

- While you can clear the trouble code temporarily, it is important to address the root cause of the problem to prevent it from reoccurring and potentially causing more significant issues.

8. Can a DIY enthusiast fix the Throttle Position Sensor 2 Circuit High Voltage problem?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to replace the throttle position sensor or repair wiring issues. However, it is recommended to seek professional help for accurate diagnosis and repair.

9. How much does it typically cost to fix the P0223 code on a 2018 GMC Sierra?

- The cost of fixing the P0223 code can vary depending on the extent of the issue, the cost of parts, and labor rates. It is advisable to get a few quotes from reputable mechanics or dealerships for an accurate estimate.

10. Will fixing the Throttle Position Sensor 2 Circuit High Voltage issue improve my vehicle's performance?

- Yes, addressing the P0223 code and fixing the underlying problem will help restore your GMC Sierra's performance, improve fuel efficiency, and prevent potential drivability issues.

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