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Engine-Codes – Infiniti – P0123 2005 Infiniti G35

P0123 2005 Infiniti G35 Code - Throttle Position Sensor/Switch '1' Circuit High Input

Quick Answer

The P0123 code on a 2005 Infiniti G35 indicates a problem 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, Issues with the throttle body. 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 2005 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, Issues with the throttle body.
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 11, 2024
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Code P0123 2005 Infiniti G35 Description

The P0123 code on a 2005 Infiniti G35 indicates a problem with the Throttle Position Sensor/Switch '1' Circuit High Input. The throttle position sensor (TPS) is a crucial component of the engine management system, as it monitors the position of the throttle butterfly valve. The TPS sends this data to the engine control module (ECM) to determine the appropriate air-fuel mixture for efficient engine operation. When the ECM detects a high input signal from the TPS, it triggers the P0123 code.

OBDII Code P0123 2005 Infiniti G35 - Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2005 Infiniti G35 Code - Throttle Position Sensor/Switch '1' Circuit High Input

Common Causes of P0123 2005 Infiniti G35

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Issues with the throttle body
  4. ECM malfunction
  5. Vacuum leaks affecting sensor readings

Symptoms of P0123 2005 Infiniti G35

  1. Poor acceleration or hesitation when pressing on the gas pedal
  2. Engine stalling or rough idling
  3. Difficulty starting the engine
  4. Reduced fuel efficiency
  5. Illumination of the Check Engine Light

How to Fix P0123 2005 Infiniti G35

  1. Diagnose the issue by using a scan tool to read the error code and test the TPS voltage.
  2. Inspect the wiring and connectors associated with the TPS for any damage or corrosion.
  3. Replace the throttle position sensor if found to be faulty.
  4. Clear the error code and reset the ECM to see if the issue persists.
  5. Test drive the vehicle to ensure the problem has been resolved.

Cost to Fix P0123 2005 Infiniti G35

The typical repair costs for addressing the P0123 code on a 2005 Infiniti G35 can vary depending on the specific cause of the issue. Replacing the throttle position sensor can range from $100 to $300, including parts and labor. Additional costs may apply if there are wiring or ECM issues that need to be addressed. It's important to consider the specific diagnosis time and labor rates at auto repair shops in your area for a more accurate estimate.

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 2005 Infiniti G35 Code

1. What are common symptoms of OBDII code P0123 in a 2005 Infiniti G35?

The common symptoms of OBDII code P0123 in a 2005 Infiniti G35 include issues with acceleration, poor engine performance, and an illuminated Check Engine light.

2. What does the OBDII code P0123 'Throttle Position Sensor/Switch '1' Circuit High Input' mean for a 2005 Infiniti G35?

The code P0123 indicates that the Engine Control Module (ECM) has detected a high voltage input from the throttle position sensor or switch in the 2005 Infiniti G35.

3. What are the potential causes of OBDII code P0123 in a 2005 Infiniti G35?

Common causes of OBDII code P0123 in a 2005 Infiniti G35 include a faulty throttle position sensor, damaged wiring or connectors, or issues with the throttle body itself.

4. How can I diagnose OBDII code P0123 in my 2005 Infiniti G35?

To diagnose OBDII code P0123 in a 2005 Infiniti G35, you can use an OBDII scanner to check for the code, visually inspect the throttle position sensor and related components, and test the sensor's voltage with a multimeter.

5. Can I still drive my 2005 Infiniti G35 with OBDII code P0123?

It is not recommended to drive your 2005 Infiniti G35 with OBDII code P0123 as it can lead to poor engine performance and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P0123 in my 2005 Infiniti G35?

To repair OBDII code P0123 in a 2005 Infiniti G35, you may need to replace the throttle position sensor, repair damaged wiring or connectors, or clean the throttle body to ensure proper operation.

7. Is it possible to reset OBDII code P0123 in a 2005 Infiniti G35 without fixing the underlying issue?

Resetting the OBDII code P0123 in a 2005 Infiniti G35 without addressing the underlying issue may temporarily turn off the Check Engine light, but the problem will likely reoccur until properly repaired.

8. How much does it cost to fix OBDII code P0123 in a 2005 Infiniti G35?

The cost to fix OBDII code P0123 in a 2005 Infiniti G35 can vary depending on the specific repair needed, such as replacing the throttle position sensor or repairing wiring. Costs may range from $100 to $300 or more.

9. Can a DIY enthusiast repair OBDII code P0123 in a 2005 Infiniti G35?

Depending on your skill level and access to tools, a DIY enthusiast may be able to repair OBDII code P0123 in a 2005 Infiniti G35 by following step-by-step guides, watching tutorials, and using caution when working on the vehicle.

10. How long does it take to fix OBDII code P0123 in a 2005 Infiniti G35?

The time it takes to fix OBDII code P0123 in a 2005 Infiniti G35 can vary based on the specific repair needed. In general, it may take anywhere from 1 to 3 hours for a skilled mechanic to diagnose and repair the issue.

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