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P0223 2003 Infiniti G35 Code - Throttle Position Sensor/Switch 2 Circuit High Input

Quick Answer

The P0223 code for a 2003 Infiniti G35 indicates a problem with the Throttle Position Sensor/Switch 2 Circuit, specifically a high input signal detected by the Engine Control Module (ECM). Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections in the sensor circuit. 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 2003 Infiniti G35 indicates Throttle Position Sensor/Switch 2 Circuit High Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections in the sensor circuit.
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 09, 2024
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Code P0223 2003 Infiniti G35 Description

The P0223 code for a 2003 Infiniti G35 indicates a problem with the Throttle Position Sensor/Switch 2 Circuit, specifically a high input signal detected by the Engine Control Module (ECM). The throttle position sensor (TPS) is a crucial component that monitors the position of the throttle valve and sends this information to the ECM. This data is used by the ECM to adjust fuel delivery and ignition timing to optimize engine performance. When the ECM detects a high input signal from the TPS, it means that the voltage signal is above the normal range, indicating a potential issue with the sensor or its circuit.

OBDII Code P0223 2003 Infiniti G35 - Throttle Position Sensor/Switch 2 Circuit High Input
P0223 2003 Infiniti G35 Code - Throttle Position Sensor/Switch 2 Circuit High Input

Common Causes of P0223 2003 Infiniti G35

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion or poor connections in the sensor circuit
  4. ECM malfunction
  5. Mechanical issues with the throttle body

Symptoms of P0223 2003 Infiniti G35

  1. Engine hesitation or surging
  2. Rough idling or stalling
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated
  5. Limp mode activation

How to Fix P0223 2003 Infiniti G35

  1. Begin by diagnosing the issue using a diagnostic scanner to confirm the P0223 code and pinpoint the exact cause of the high input signal.
  2. Inspect the throttle position sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components as needed.
  3. Test the TPS using a multimeter to ensure it is functioning within the manufacturer's specified range. Adjust or replace the sensor if necessary.
  4. Clear the error code using the diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to identify any underlying issues with the ECM or throttle body.

Cost to Fix P0223 2003 Infiniti G35

The typical repair costs for addressing a P0223 code on a 2003 Infiniti G35 can vary depending on the specific cause of the issue. In general, replacing a faulty throttle position sensor can cost between $100 to $200, while addressing wiring or connector issues may range from $50 to $150. Labor costs can add an additional $80 to $150 per hour, and overall repair costs can range from $200 to $500 or more. It's important to consider the diagnosis time and labor rates at your local auto repair shop, as these can impact the final cost of the repair.

When is the Code Detected?

An excessively high voltage from the Throttle Position Sensor (TPS) 2 is sent to Engine Control Module (ECM).

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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 2003 Infiniti G35 Code

1. What does the OBDII code P0223 mean for a 2003 Infiniti G35?

P0223 indicates a high input signal from Throttle Position Sensor (TPS) 2, meaning the voltage is higher than expected by the engine control module (ECM).

2. What are the common symptoms of code P0223 in a 2003 Infiniti G35?

Symptoms may include poor acceleration, engine hesitation, stalling, a lack of throttle response, or the vehicle going into limp mode.

3. What are the most common causes of a P0223 code?

Common causes include a faulty throttle position sensor, wiring issues such as short circuits or poor connections, or a malfunctioning ECM.

4. Can I drive my 2003 Infiniti G35 with a P0223 code?

Driving with this code is not recommended, as it can lead to erratic engine performance, reduced safety, and potential damage to the engine.

5. How do I diagnose a P0223 code on my Infiniti G35?

Start by inspecting the throttle position sensor and its wiring for damage, clean or reconnect any loose connections, and use a multimeter to check for proper voltage and continuity.

6. Can a dirty throttle body cause code P0223?

While rare, a dirty throttle body can sometimes cause issues with the throttle position sensor's readings, so cleaning it may help resolve the problem.

7. How much does it cost to fix a P0223 code on a 2003 Infiniti G35?

Repair costs can vary, but replacing the throttle position sensor typically costs $150–$300, including parts and labor.

8. What tools are needed to troubleshoot a P0223 code?

You’ll need an OBDII scanner, a multimeter, and basic hand tools to diagnose and repair the issue.

9. Does a P0223 code always mean the throttle position sensor is bad?

No, it can also be caused by wiring problems, a bad ECM, or other related components, so a thorough diagnosis is necessary.

10. Will clearing the P0223 code with an OBDII scanner fix the problem?

Clearing the code will turn off the check engine light temporarily, but if the underlying issue isn’t resolved, the code will return.

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