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Engine-Codes – Infiniti – P0123 2004 Infiniti G35

P0123 2004 Infiniti G35 Code - Throttle Position Sensor/Switch '1' Circuit High Input

Quick Answer

The P0123 code for a 2004 Infiniti G35 indicates an issue with the Throttle Position Sensor/Switch '1' Circuit High Input. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion in the TPS 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
P0123 2004 Infiniti G35 indicates Throttle Position Sensor/Switch '1' Circuit High Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion in the TPS 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 08, 2024
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Code P0123 2004 Infiniti G35 Description

The P0123 code for a 2004 Infiniti G35 indicates an issue with the Throttle Position Sensor/Switch '1' Circuit High Input. The throttle position sensor (TPS) is a crucial component in the engine management system, as it monitors the position of the throttle valve and sends this information to the engine control module (ECM). The ECM uses this data to determine the appropriate fuel delivery and ignition timing for optimal engine performance.

OBDII Code P0123 2004 Infiniti G35 - Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2004 Infiniti G35 Code - Throttle Position Sensor/Switch '1' Circuit High Input

Common Causes of P0123 2004 Infiniti G35

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion in the TPS circuit
  4. ECM malfunction
  5. Poor electrical connections

Symptoms of P0123 2004 Infiniti G35

  1. Rough idling or stalling
  2. Hesitation or lack of response when accelerating
  3. Decreased fuel efficiency
  4. Engine misfires
  5. Check Engine Light illuminated

How to Fix P0123 2004 Infiniti G35

  1. Begin by diagnosing the issue using a scan tool to confirm the P0123 code and pinpoint the exact cause of the high input signal.
  2. Inspect the throttle position sensor, wiring, and connectors for any visible damage, corrosion, or loose connections. Replace or repair any damaged components.
  3. Test the TPS using a multimeter to ensure it is functioning within the specified voltage range. Replace the sensor if it is out of range.
  4. Clear the trouble code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be necessary to identify any underlying issues with the ECM or other related components.

Cost to Fix P0123 2004 Infiniti G35

The typical repair costs for addressing a Throttle Position Sensor/Switch '1' Circuit High Input issue can range from $100 to $300, depending on the cost of the replacement parts and the labor involved. This estimate may vary based on the location of the repair shop, the make and model of the vehicle, and the specific engine type. Additionally, the diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It is recommended to contact local repair shops for a more accurate estimate based on your specific circumstances.

When is the Code Detected?

An excessively high voltage from the Throttle Position Sensor (TPS) '1' 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 P0123 2004 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0123 in a 2004 Infiniti G35?

- Common symptoms include poor acceleration, engine stalling, rough idling, and the vehicle going into limp mode.

2. What does the OBDII code P0123 in a 2004 Infiniti G35 mean?

- The code P0123 indicates that the throttle position sensor/switch '1' circuit is reporting a high input signal to the engine control module (ECM).

3. What are the possible causes of OBDII code P0123 in a 2004 Infiniti G35?

- The possible causes include a faulty throttle position sensor, wiring or connector issues, a stuck throttle plate, or a malfunctioning ECM.

4. How can I diagnose the OBDII code P0123 in a 2004 Infiniti G35?

- You can diagnose the code by checking the throttle position sensor's voltage readings, inspecting the wiring and connectors for any damage, and performing a throttle body inspection.

5. Can I still drive my 2004 Infiniti G35 with OBDII code P0123?

- It is not recommended to drive the vehicle with code P0123 as it can lead to performance issues and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P0123 in a 2004 Infiniti G35?

- The repair typically involves replacing the throttle position sensor if it's faulty, repairing any damaged wiring or connectors, and clearing the code with a diagnostic tool.

7. Is it necessary to reset the ECM after repairing OBDII code P0123 in a 2004 Infiniti G35?

- Yes, it's recommended to reset the ECM after repairing the issue to clear the error code and allow the ECM to relearn the throttle position sensor's new readings.

8. Can a dirty throttle body cause OBDII code P0123 in a 2004 Infiniti G35?

- Yes, a dirty throttle body can cause erratic readings from the throttle position sensor, leading to code P0123. Cleaning the throttle body may help resolve the issue.

9. How long does it take to repair OBDII code P0123 in a 2004 Infiniti G35?

- The repair time can vary depending on the exact cause of the code. It can take anywhere from 30 minutes to a few hours to diagnose and repair the issue.

10. Will OBDII code P0123 in a 2004 Infiniti G35 affect fuel economy?

- Yes, code P0123 can affect fuel economy as it can lead to improper air-fuel mixtures and engine performance, resulting in decreased fuel efficiency.

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