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Engine-Codes – Nissan – P0123 2007 Nissan Maxima

P0123 2007 Nissan Maxima Code - Throttle Position Sensor/Switch '1' Circuit High Input

Quick Answer

The P0123 diagnostic trouble code (DTC) for a 2007 Nissan Maxima indicates that the Throttle Position Sensor/Switch '1' Circuit has detected a high input signal. Common causes include Faulty throttle position sensor, Wiring or connector issues in the TPS circuit, ECM software malfunction. 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 2007 Nissan Maxima indicates Throttle Position Sensor/Switch '1' Circuit High Input.
Common causes
Common causes include Faulty throttle position sensor, Wiring or connector issues in the TPS circuit, ECM software malfunction.
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 P0123 2007 Nissan Maxima Description

The P0123 diagnostic trouble code (DTC) for a 2007 Nissan Maxima indicates that the Throttle Position Sensor/Switch '1' Circuit has detected a high input signal. The throttle position sensor (TPS) is a crucial component of the vehicle's electronic fuel injection 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 calculate the appropriate air-fuel mixture for optimal engine performance and efficiency.

OBDII Code P0123 2007 Nissan Maxima - Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2007 Nissan Maxima Code - Throttle Position Sensor/Switch '1' Circuit High Input

Common Causes of P0123 2007 Nissan Maxima

  1. Faulty throttle position sensor
  2. Wiring or connector issues in the TPS circuit
  3. ECM software malfunction
  4. Intermittent electrical connection
  5. Throttle valve sticking or binding

Symptoms of P0123 2007 Nissan Maxima

  1. Erratic or surging idle speed
  2. Reduced engine power or acceleration
  3. Stalling or hesitation during acceleration
  4. Illuminated check engine light
  5. Poor fuel economy

How to Fix P0123 2007 Nissan Maxima

  1. Begin by visually inspecting the TPS wiring and connector for any signs of damage or corrosion. Repair or replace any damaged components.
  2. Test the TPS using a multimeter to ensure it is functioning within the specified voltage range. Replace the TPS if it is out of range.
  3. Check for any loose or corroded connections in the TPS circuit, and repair as necessary.
  4. Clear the DTC using a scan tool, and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, consider consulting a professional mechanic for further diagnosis and repair.

Cost to Fix P0123 2007 Nissan Maxima

The typical repair cost for addressing a P0123 DTC on a 2007 Nissan Maxima can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Therefore, it's recommended to obtain quotes from multiple shops to ensure a fair price for the repair.

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 2007 Nissan Maxima Code

1. What are common symptoms of OBDII code P0123 on a 2007 Nissan Maxima?

- Common symptoms include rough idling, stalling, poor acceleration, and possibly an illuminated check engine light.

2. What does the OBDII code P0123 in a 2007 Nissan Maxima indicate?

- The code P0123 indicates an issue with the Throttle Position Sensor/Switch '1' Circuit High Input.

3. What can cause the Throttle Position Sensor/Switch '1' Circuit High Input error in a 2007 Nissan Maxima?

- Potential causes include a faulty throttle position sensor, damaged wiring or connectors, or a malfunctioning electronic throttle control system.

4. How can I diagnose the Throttle Position Sensor/Switch '1' Circuit High Input issue in my 2007 Nissan Maxima?

- Diagnosing the issue involves using an OBDII scanner to retrieve the fault code, checking the throttle position sensor's wiring and connections, and testing the sensor's voltage output.

5. Can I still drive my 2007 Nissan Maxima with OBDII code P0123?

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

6. How can I repair the Throttle Position Sensor/Switch '1' Circuit High Input problem in my 2007 Nissan Maxima?

- Repair options may include replacing the throttle position sensor, repairing damaged wiring or connectors, or resetting the electronic throttle control system.

7. Is it possible to reset the OBDII code P0123 in a 2007 Nissan Maxima without repairs?

- While clearing the code may temporarily turn off the check engine light, it is essential to address the underlying issue to prevent further problems.

8. Can a DIY enthusiast fix the Throttle Position Sensor/Switch '1' Circuit High Input error in a 2007 Nissan Maxima?

- Depending on your skill level and access to tools, you may be able to replace the throttle position sensor yourself. However, diagnosing and repairing wiring issues may require professional assistance.

9. How much does it typically cost to repair OBDII code P0123 in a 2007 Nissan Maxima?

- The cost of repair can vary depending on the cause of the issue and whether you choose to DIY or seek professional help. Costs may range from $100 to $300 or more.

10. Will fixing the Throttle Position Sensor/Switch '1' Circuit High Input issue improve the performance of my 2007 Nissan Maxima?

- Yes, addressing this issue should improve the vehicle's performance, including smoother acceleration and idling, as well as better fuel efficiency.

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