Engine-Codes.com
Engine-Codes – Nissan – P0123 2009 Nissan Versa

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

Quick Answer

The P0123 code on a 2009 Nissan Versa indicates a problem with the Throttle Position Sensor/Switch '1' Circuit, specifically a high input signal. Common causes include Faulty TPS: The throttle position sensor itself may be malfunctioning, leading to inaccurate voltage readings, Wiring issues: Damaged wiring or connectors in the TPS circuit can disrupt the signal sent to the ECU, ECU malfunction: A fault in the engine control unit can also cause high input signals from the TPS. 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 Versa indicates Throttle Position Sensor/Switch '1' Circuit High Input.
Common causes
Common causes include Faulty TPS: The throttle position sensor itself may be malfunctioning, leading to inaccurate voltage readings, Wiring issues: Damaged wiring or connectors in the TPS circuit can disrupt the signal sent to the ECU, ECU malfunction: A fault in the engine control unit can also cause high input signals from the TPS.
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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0123 2009 Nissan Versa Description

The P0123 code on a 2009 Nissan Versa indicates a problem with the Throttle Position Sensor/Switch '1' Circuit, specifically a high input signal. 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 this information to the engine control unit (ECU). The ECU uses this data to determine the appropriate air-fuel mixture for optimal engine performance and efficiency.

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

Common Causes of P0123 2009 Nissan Versa

  1. Faulty TPS: The throttle position sensor itself may be malfunctioning, leading to inaccurate voltage readings.
  2. Wiring issues: Damaged wiring or connectors in the TPS circuit can disrupt the signal sent to the ECU.
  3. ECU malfunction: A fault in the engine control unit can also cause high input signals from the TPS.
  4. Environmental factors: Exposure to moisture, dirt, or extreme temperatures can damage the TPS or its wiring.

Symptoms of P0123 2009 Nissan Versa

  1. Erratic idling: The engine may idle erratically or stall due to incorrect throttle position readings.
  2. Hesitation: The vehicle may hesitate or lack responsiveness when accelerating, as the ECU receives inaccurate throttle position data.
  3. Poor acceleration: Acceleration may be sluggish or uneven, affecting the vehicle's overall performance.
  4. Engine misfires: Misfires can occur when the engine receives incorrect air-fuel mixture due to faulty TPS readings.

How to Fix P0123 2009 Nissan Versa

  1. Diagnostic scan: Use an OBD-II scanner to retrieve the trouble code and verify the high input signal from the TPS.
  2. TPS replacement: Replace the throttle position sensor with a new, OEM-quality part to ensure accurate readings.
  3. Check wiring: Inspect the wiring and connectors in the TPS circuit for any damage and repair or replace as necessary.
  4. Clear codes: Clear the trouble code from the ECU's memory and perform a test drive to ensure the issue has been resolved.
  5. Relearn procedure: Perform a throttle position sensor relearn procedure to calibrate the new sensor and ensure proper functionality.

Cost to Fix P0123 2009 Nissan Versa

The cost of repairing a P0123 code on a 2009 Nissan Versa can vary depending on the specific cause of the issue. On average, the replacement of a throttle position sensor can range from $50 to $150, while labor costs can add another $50 to $100. If wiring repairs or ECU replacement are required, the total cost may increase significantly. It's recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the specific diagnosis and repair needed. Keep in mind that labor rates can vary between different locations and types of repair facilities.

When is the Code Detected?

An excessively high voltage from the Throttle Position Sensor (TPS) '1' is sent to Engine Control Module (ECM).

Need more information about the P0123 2009 Nissan Versa code?

Need more information on how to fix the P0123 2009 Nissan Versa code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0123 2009 Nissan Versa code diagnosed by a professional: Find a repair shop in your area

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 Versa Code

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

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.

2. What causes the Throttle Position Sensor/Switch '1' Circuit High Input code in a 2009 Nissan Versa?

- The most common causes are a faulty throttle position sensor, a short or open circuit in the sensor wiring, or a problem with the engine control module.

3. How can I diagnose the P0123 code in my 2009 Nissan Versa?

- Use a diagnostic scanner to read the code and check the throttle position sensor's voltage readings. Inspect the sensor wiring for any signs of damage or corrosion.

4. Can I drive my 2009 Nissan Versa with OBDII code P0123?

- It is not recommended to drive with this code as it can cause performance issues and potentially lead to further damage to the engine or other components.

5. How do I repair the Throttle Position Sensor/Switch '1' Circuit High Input code in my 2009 Nissan Versa?

- Replace the throttle position sensor if found faulty, repair any damaged wiring, and clear the code with a diagnostic scanner.

6. Are there any DIY tips for fixing the P0123 code in a 2009 Nissan Versa?

- While some may attempt to replace the throttle position sensor themselves, it's recommended to have the repair done by a qualified mechanic for proper diagnosis and installation.

7. How much does it cost to repair OBDII code P0123 in a 2009 Nissan Versa?

- The cost of repair can vary depending on the root cause of the issue, but replacing the throttle position sensor can range from $100 to $300 including parts and labor.

8. Will resetting the OBDII code P0123 in my 2009 Nissan Versa make it go away permanently?

- Resetting the code may temporarily clear it, but if the underlying issue is not fixed, the code is likely to reappear once the problem is detected again.

9. Can a bad throttle position sensor cause other codes to appear in a 2009 Nissan Versa?

- Yes, a faulty throttle position sensor can trigger other related codes such as P0121 or P0122, which also indicate issues with the sensor's circuitry or performance.

10. How often should the throttle position sensor be replaced in a 2009 Nissan Versa?

- The throttle position sensor typically lasts for several years, but if it fails prematurely or exhibits symptoms of malfunction, it should be replaced promptly to avoid further complications.

Discuss the causes and fixes for P0123 2009 Nissan Versa OBDII Code

Submit a New Comment

Code P0123 2009 Nissan Versa comments

No comments found for this page.