AutoCodes – GMC – P0223 2018 GMC Sierra

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

Quick Answer

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly circuit poor electrical connection. 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 Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly circuit poor electrical connection.
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.

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Code Popularity 233

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 20, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0223 2018 GMC Sierra Description

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. The throttle position sensor is mounted within the throttle body assembly and is not serviceable. The Engine Control Module (ECM) supplies the throttle body with a 5 V reference circuit, a low reference circuit. The asynchronous signal means communication is only going from the throttle body to the ECM. The throttle body cannot receive data from the ECM over the signal/serial data circuit. The throttle position sensor provides a signal voltage that changes relative to throttle blade angle. The throttle position sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal and is used as voltages for throttle position sensor 1 and 2. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the throttle position sensor 2 signal voltage is greater than 4.6 V for greater than 1 s.

OBDII Code P0223 2018 GMC Sierra - Throttle Position Sensor 2 Circuit High Voltage - AutoCodes.com — P0223 2018 GMC Sierra Code - Throttle Position Sensor 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0223 2018 GMC Sierra?

Faulty Throttle Body Assembly
Throttle Body Assembly harness is open or shorted
Throttle Body Assembly circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0223 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

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0223 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 P0223 2018 GMC Sierra code?

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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.