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Engine-Codes – GMC – P0223 GMC

P0223 GMC Code - Throttle Position Sensor 2 Circuit High Voltage

Quick Answer

When a GMC vehicle displays the diagnostic trouble code (DTC) P0223, it indicates an issue with the Throttle Position Sensor 2 (TPS 2) circuit showing high voltage. Common causes include Faulty Throttle Position Sensor: A malfunctioning TPS 2 could be sending incorrect voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring connections between the TPS 2 sensor and the ECM can cause high voltage readings, ECM Malfunction: A problem with the engine control module itself may be causing the TPS 2 circuit to display high voltage. 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 GMC indicates Throttle Position Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty Throttle Position Sensor: A malfunctioning TPS 2 could be sending incorrect voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring connections between the TPS 2 sensor and the ECM can cause high voltage readings, ECM Malfunction: A problem with the engine control module itself may be causing the TPS 2 circuit to display high voltage.
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 10, 2024
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Code P0223 GMC Description

When a GMC vehicle displays the diagnostic trouble code (DTC) P0223, it indicates an issue with the Throttle Position Sensor 2 (TPS 2) circuit showing high voltage. The TPS is a crucial component of the vehicle's electronic throttle control system, responsible for monitoring the position of the throttle valve and sending this information to the engine control module (ECM). The ECM then uses this data to determine the appropriate fuel injection and ignition timing for optimal engine performance.

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

Common Causes of P0223 GMC

  1. Faulty Throttle Position Sensor: A malfunctioning TPS 2 could be sending incorrect voltage signals to the ECM.
  2. Wiring Issues: Damaged or corroded wiring connections between the TPS 2 sensor and the ECM can cause high voltage readings.
  3. ECM Malfunction: A problem with the engine control module itself may be causing the TPS 2 circuit to display high voltage.
  4. Short Circuit: Any short circuits in the TPS 2 circuit can lead to abnormal voltage readings.
  5. Environmental Factors: Exposure to extreme temperatures, moisture, or contaminants can also impact the TPS 2 circuit's performance.

Symptoms of P0223 GMC

  1. Check Engine Light: The most common symptom associated with DTC P0223 is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Power: The vehicle may experience a loss of power or acceleration due to incorrect throttle position readings.
  3. Rough Idling: An irregular or rough idling engine can be a sign of a malfunctioning TPS 2 circuit.
  4. Stalling: In severe cases, the engine may stall or shut off unexpectedly, especially during idle or low-speed driving.
  5. Poor Fuel Efficiency: High voltage in the TPS 2 circuit can result in inefficient fuel delivery, leading to decreased fuel economy.

How to Fix P0223 GMC

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes, then perform a thorough inspection of the TPS 2 circuit and related components.
  2. Replace Throttle Position Sensor: If the TPS 2 is found to be faulty, replace it with a new, OEM-quality sensor.
  3. Check Wiring Connections: Inspect all wiring connections for damage or corrosion, repairing or replacing any faulty connections as necessary.
  4. Reset ECM: Clear the trouble codes and reset the ECM to see if the issue persists after repairs have been made.
  5. Test Drive and Monitor: Take the vehicle for a test drive to ensure that the repair has resolved the high voltage issue, and monitor for any reoccurrence of symptoms.

Cost to Fix P0223 GMC

The cost of repairing a Throttle Position Sensor 2 Circuit High Voltage issue can vary depending on the extent of the problem and the specific vehicle. Typically, the cost of a new Throttle Position Sensor ranges from $50 to $150, while labor costs can range from $100 to $200, depending on the shop's hourly rates. Overall, the total repair cost for this issue could range from $150 to $350, including parts and labor. It is advisable to consult with a trusted mechanic or auto repair shop for a more accurate cost estimate tailored to your vehicle's make and model. Labor rates at auto repair shops can vary based on location, the complexity of the repair, and the technician's experience level.

What does this mean?

Tech Notes for P0223 GMC









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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.

Frequently Asked Questions about P0223 GMC Code

1. What are the common symptoms of OBDII code P0223 GMC (Throttle Position Sensor 2 Circuit High Voltage)?

The common symptoms of code P0223 include the check engine light coming on, reduced engine power, rough idling, and difficulty accelerating.

2. What causes OBDII code P0223 GMC to be triggered?

Code P0223 is typically triggered by a faulty throttle position sensor, damaged wiring or connectors in the throttle position sensor circuit, or a malfunctioning Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P0223 GMC?

Diagnosing code P0223 involves using a scan tool to read the code, checking the throttle position sensor for proper operation, inspecting the wiring and connectors for damage, and testing the ECM if necessary.

4. Can I still drive my vehicle with OBDII code P0223 GMC?

It is not recommended to drive your vehicle with code P0223 present, as it can lead to issues like poor performance and potential safety hazards. It's best to address the problem promptly.

5. How can I repair OBDII code P0223 GMC?

Repairing code P0223 involves replacing the faulty throttle position sensor, repairing any damaged wiring or connectors in the sensor circuit, and clearing the code with a scan tool.

6. Is it possible to reset OBDII code P0223 GMC without fixing the underlying issue?

While you can clear the code temporarily with a scan tool, it will likely reappear if the underlying issue is not addressed. It's important to fix the root cause of the problem.

7. Are there any DIY tips for troubleshooting OBDII code P0223 GMC?

You can start by visually inspecting the throttle position sensor and its wiring for any obvious signs of damage. However, a proper diagnosis with a scan tool may be necessary for an accurate assessment.

8. How much does it cost to repair OBDII code P0223 GMC at a repair shop?

The cost of repairing code P0223 can vary depending on the extent of the issue, the labor rates of the repair shop, and the cost of parts. It's best to get a quote from a trusted mechanic.

9. Can a dirty throttle body cause OBDII code P0223 GMC?

While a dirty throttle body can cause related issues, such as poor acceleration or rough idling, it is not typically the direct cause of code P0223. Focus on checking the throttle position sensor and its circuitry first.

10. How often does OBDII code P0223 GMC occur in GMC vehicles?

Code P0223 can occur in GMC vehicles with electronic throttle control systems, especially in models that have been on the road for a while. Regular maintenance and timely repairs can help prevent this code from appearing.

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