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Engine-Codes – Nissan – P0123 2009 Nissan Pathfinder

P0123 2009 Nissan Pathfinder Code - Throttle Position Sensor/Switch '1' Circuit High Input

Quick Answer

The P0123 diagnostic trouble code (DTC) for a 2009 Nissan Pathfinder indicates a problem with the Throttle Position Sensor/Switch '1' Circuit High Input. Common causes include Faulty throttle position sensor, Damaged or corroded wiring in the TPS circuit, Loose or disconnected TPS connector. 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 2009 Nissan Pathfinder indicates Throttle Position Sensor/Switch '1' Circuit High Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged or corroded wiring in the TPS circuit, Loose or disconnected TPS connector.
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 13, 2024
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Code P0123 2009 Nissan Pathfinder Description

The P0123 diagnostic trouble code (DTC) for a 2009 Nissan Pathfinder indicates a problem with the Throttle Position Sensor/Switch '1' Circuit High Input. The throttle position sensor (TPS) is a crucial component of the vehicle's electronic control system, as it monitors the position of the throttle valve and sends signals to the engine control module (ECM) to adjust fuel injection and ignition timing. When the ECM detects a high input signal from the TPS, it triggers the P0123 code, indicating a potential issue with the sensor's circuit.

OBDII Code P0123 2009 Nissan Pathfinder - Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2009 Nissan Pathfinder Code - Throttle Position Sensor/Switch '1' Circuit High Input

Common Causes of P0123 2009 Nissan Pathfinder

  1. Faulty throttle position sensor
  2. Damaged or corroded wiring in the TPS circuit
  3. Loose or disconnected TPS connector
  4. Malfunctioning ECM
  5. Environmental factors such as moisture or debris affecting the TPS

Symptoms of P0123 2009 Nissan Pathfinder

  1. Poor acceleration and throttle response
  2. Rough idling or stalling
  3. Engine misfires
  4. Illumination of the Check Engine Light
  5. Reduced fuel efficiency

How to Fix P0123 2009 Nissan Pathfinder

  1. Begin by conducting a comprehensive diagnostic scan to confirm the P0123 code and identify the specific cause of the high input signal.
  2. Inspect the throttle position sensor for any signs of damage or wear, and test its functionality using a multimeter.
  3. Check the wiring and connectors in the TPS circuit for any corrosion, breaks, or loose connections, and repair or replace as needed.
  4. If the TPS is determined to be faulty, replace it with a new sensor following the manufacturer's guidelines.
  5. Clear the DTC from the ECM memory using a diagnostic scan tool and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0123 2009 Nissan Pathfinder

The typical repair costs for addressing a P0123 code on a 2009 Nissan Pathfinder can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the price of a new throttle position sensor, any necessary wiring repairs, and the labor involved in diagnosing and fixing the problem. It is important to note that the actual repair costs may vary based on the location of the repair shop, the vehicle's make and model, and the extent of the repairs required. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It is advisable to obtain a detailed quote from a trusted mechanic to determine the precise cost of addressing the P0123 code on your Nissan Pathfinder.

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 2009 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P0123 in a 2009 Nissan Pathfinder?

- Common symptoms include issues with acceleration, rough idling, stalling, and decreased fuel efficiency.

2. What does the OBDII code P0123 indicate for a 2009 Nissan Pathfinder?

- The code P0123 indicates a high input signal from the throttle position sensor or switch '1' circuit in the vehicle.

3. What are the possible causes of OBDII code P0123 in a 2009 Nissan Pathfinder?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, a malfunctioning throttle body, or issues with the engine control module (ECM).

4. How serious is OBDII code P0123 in a 2009 Nissan Pathfinder?

- This code should be addressed promptly to prevent potential safety hazards and further damage to the engine or other components of the vehicle.

5. Can I continue driving my 2009 Nissan Pathfinder with OBDII code P0123?

- It is not recommended to continue driving the vehicle with this code as it can lead to poor performance and potential safety risks.

6. How can I diagnose OBDII code P0123 in a 2009 Nissan Pathfinder?

- Diagnosis involves using a scan tool to retrieve the code, testing the throttle position sensor, inspecting wiring and connectors, and checking the throttle body for any issues.

7. What are some repair tips for fixing OBDII code P0123 in a 2009 Nissan Pathfinder?

- Repair tips include replacing the throttle position sensor, repairing any damaged wiring or connectors, cleaning the throttle body, or reprogramming the ECM if necessary.

8. Can I reset the OBDII code P0123 in a 2009 Nissan Pathfinder by disconnecting the battery?

- While disconnecting the battery may clear the code temporarily, it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. How much does it typically cost to repair OBDII code P0123 in a 2009 Nissan Pathfinder?

- The cost of repair can vary depending on the specific cause of the code, but it may range from $100 to $300 for parts and labor.

10. Is it possible to prevent OBDII code P0123 from appearing in a 2009 Nissan Pathfinder?

- Regular maintenance, such as cleaning the throttle body and inspecting wiring connections, can help prevent issues that may trigger this code.

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