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Engine-Codes – Nissan – P0123 2011 Nissan Versa

P0123 2011 Nissan Versa Code - Throttle Position Sensor/Switch '1' Circuit High Input

Quick Answer

The P0123 diagnostic trouble code in a 2011 Nissan Versa is associated with the throttle position sensor (TPS) circuit. Common causes include Faulty or failing throttle position sensor, Shorted or open connector in the TPS circuit, Corrosion or physical damage to the TPS wiring. 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 2011 Nissan Versa indicates Throttle Position Sensor/Switch '1' Circuit High Input.
Common causes
Common causes include Faulty or failing throttle position sensor, Shorted or open connector in the TPS circuit, Corrosion or physical damage to the TPS wiring.
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 12, 2024
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Code P0123 2011 Nissan Versa Description

The P0123 diagnostic trouble code in a 2011 Nissan Versa is associated with the throttle position sensor (TPS) circuit. This sensor is responsible for monitoring the position of the throttle butterfly valve, which adjusts air and fuel mixture for combustion. The data from TPS is sent to the vehicle's engine control unit (ECU) to optimize engine performance and fuel efficiency.

OBDII Code P0123 2011 Nissan Versa - Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2011 Nissan Versa Code - Throttle Position Sensor/Switch '1' Circuit High Input

Common Causes of P0123 2011 Nissan Versa

  1. Faulty or failing throttle position sensor.
  2. Shorted or open connector in the TPS circuit.
  3. Corrosion or physical damage to the TPS wiring.
  4. Faulty ECU.
  5. Faulty throttle body.

Symptoms of P0123 2011 Nissan Versa

  1. Erratic or high idle speed.
  2. Difficulty starting the vehicle.
  3. Poor fuel economy.
  4. Lack of power or stalling when accelerating.
  5. Check Engine Light illuminated on the dashboard.

How to Fix P0123 2011 Nissan Versa

  1. Use a diagnostic scanner to verify the P0123 code.
  2. Inspect the TPS and its wiring for any visible signs of damage or corrosion.
  3. If no physical damage is found, use a multimeter to test the TPS circuit for continuity and resistance.
  4. Replace the TPS if it fails the multimeter test.
  5. If the TPS is functional, check the ECU and related connectors, replacing them if necessary.

Cost to Fix P0123 2011 Nissan Versa

The cost to resolve a P0123 code can vary significantly depending on the exact cause. A direct replacement of the TPS can cost between $100 and $300, including parts and labor. If the ECU needs to be replaced, the cost could range from $500 to $1500 or more. Keep in mind that diagnosis time and labor rates can depend on several factors such as the auto repair shop's location, your vehicle's make and model, and the engine type. It's advisable to check local rates 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 2011 Nissan Versa Code

1. What are the common symptoms of OBDII code P0123 in a 2011 Nissan Versa?

The common symptoms of OBDII code P0123 in a 2011 Nissan Versa include issues with acceleration, poor engine performance, and potential stalling.

2. What does the OBDII code P0123 'Throttle Position Sensor/Switch '1' Circuit High Input' mean for a 2011 Nissan Versa?

The code P0123 indicates that there is a high voltage signal coming from the throttle position sensor or its circuit in the 2011 Nissan Versa.

3. What are the possible causes of OBDII code P0123 in a 2011 Nissan Versa?

Possible causes of OBDII code P0123 in a 2011 Nissan Versa include a faulty throttle position sensor, wiring issues, or a problem with the engine control module.

4. How can I diagnose the OBDII code P0123 in my 2011 Nissan Versa?

Diagnosing OBDII code P0123 in a 2011 Nissan Versa involves checking the throttle position sensor's wiring, connections, and the sensor itself using a multimeter and diagnostic tools.

5. Can I drive my 2011 Nissan Versa with OBDII code P0123?

It is not recommended to drive your 2011 Nissan Versa with OBDII code P0123 as it can lead to poor engine performance, potential stalling, and other safety issues.

6. How can I repair OBDII code P0123 in my 2011 Nissan Versa?

Repairing OBDII code P0123 in a 2011 Nissan Versa may involve replacing the throttle position sensor, repairing any damaged wiring, or reprogramming the engine control module.

7. Is it safe to reset the OBDII code P0123 in my 2011 Nissan Versa using an OBDII scanner?

Resetting the OBDII code P0123 in a 2011 Nissan Versa using an OBDII scanner may temporarily clear the code, but it is important to address the underlying issue causing the fault code to prevent it from returning.

8. Can a dirty throttle body cause OBDII code P0123 in a 2011 Nissan Versa?

While a dirty throttle body can impact the throttle system's performance, it is not a direct cause of OBDII code P0123 in a 2011 Nissan Versa. It is still recommended to keep the throttle body clean for optimal performance.

9. Will OBDII code P0123 in my 2011 Nissan Versa affect fuel economy?

Yes, OBDII code P0123 in a 2011 Nissan Versa can affect fuel economy due to potential issues with the throttle position sensor affecting the engine's performance and fuel delivery.

10. How much does it typically cost to repair OBDII code P0123 in a 2011 Nissan Versa?

The cost to repair OBDII code P0123 in a 2011 Nissan Versa can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor.

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