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Engine-Codes – Nissan – P0123 2012 Nissan Versa

P0123 2012 Nissan Versa Code - Throttle Position Sensor/Switch '1' Circuit High Input

Quick Answer

The P0123 diagnostic trouble code (DTC) for a 2012 Nissan Versa indicates a problem with the Throttle Position Sensor/Switch '1' Circuit High Input. Common causes include Faulty throttle position sensor, Wiring or connector issues in the TPS circuit, Corrosion or contamination in the 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 2012 Nissan Versa 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, Corrosion or contamination in the 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 17, 2024
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Code P0123 2012 Nissan Versa Description

The P0123 diagnostic trouble code (DTC) for a 2012 Nissan Versa 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 fuel injection system, responsible for monitoring the position of the throttle valve and sending this information to the engine control module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing, optimizing engine performance and fuel efficiency.

OBDII Code P0123 2012 Nissan Versa - Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2012 Nissan Versa Code - Throttle Position Sensor/Switch '1' Circuit High Input

Common Causes of P0123 2012 Nissan Versa

  1. Faulty throttle position sensor
  2. Wiring or connector issues in the TPS circuit
  3. Corrosion or contamination in the TPS connector
  4. ECM software or hardware malfunction
  5. Mechanical issues affecting the throttle body operation

Symptoms of P0123 2012 Nissan Versa

  1. Erratic idling or engine surging
  2. Poor acceleration or lack of response to throttle input
  3. Stalling or difficulty starting the engine
  4. Reduced fuel efficiency
  5. Illumination of the Check Engine Light

How to Fix P0123 2012 Nissan Versa

  1. Diagnose the TPS circuit using a digital multimeter to check for voltage readings within the specified range.
  2. Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections.
  3. Test the throttle position sensor for proper operation and replace if necessary.
  4. Clear the DTC and reset the ECM to see if the code reappears after repairs.
  5. Perform a road test to ensure the vehicle's performance has been restored and the code does not return.

Cost to Fix P0123 2012 Nissan Versa

The typical repair costs for addressing a P0123 code on a 2012 Nissan Versa can vary depending on the specific cause of the issue. Replacement of a faulty throttle position sensor can range from $50 to $200, while labor costs may add another $50 to $150. If wiring repairs or ECM reprogramming are necessary, additional costs may apply. It is advisable to consult with a trusted auto repair shop for a more accurate estimate based on the specific diagnosis and repair requirements. Labor rates at auto repair shops can vary, typically ranging between $80 and $150 per hour.

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 2012 Nissan Versa Code

1. What are the common symptoms of OBDII code P0123 in a 2012 Nissan Versa?

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

2. What does the OBDII code P0123 on a 2012 Nissan Versa indicate?

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

3. What are the possible causes of the throttle position sensor/switch '1' circuit high input error in a 2012 Nissan Versa?

- Potential causes include a faulty throttle position sensor, damaged wiring or connectors, a malfunctioning electronic throttle control system, or a problem with the engine control module.

4. How can I diagnose the OBDII code P0123 in my 2012 Nissan Versa?

- Diagnosis typically involves using a scan tool to retrieve the trouble code, checking the throttle position sensor's voltage readings, inspecting wiring and connectors for damage, and testing the electronic throttle control system.

5. Can I continue driving my 2012 Nissan Versa with OBDII code P0123?

- It is not recommended to drive the vehicle with this error code, as it can lead to poor performance, potential stalling, and other safety concerns.

6. How can I fix the throttle position sensor/switch '1' circuit high input issue in my 2012 Nissan Versa?

- Repair options include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, addressing any electronic throttle control system problems, or reprogramming the engine control module.

7. Is it possible to reset the OBDII code P0123 in a 2012 Nissan Versa without fixing the underlying issue?

- While clearing the trouble code may temporarily turn off the Check Engine light, it will not solve the root cause of the problem and the code is likely to return.

8. How much does it cost to repair OBDII code P0123 in a 2012 Nissan Versa?

- Repair costs can vary based on the specific issue causing the code, but expenses may include parts and labor for sensor replacement, wiring repairs, or electronic system diagnostics.

9. Are there any maintenance tips to prevent OBDII code P0123 from occurring in a 2012 Nissan Versa?

- Regularly inspecting and maintaining the throttle position sensor, wiring, and connectors can help prevent issues that may trigger the P0123 error code.

10. Can a DIY enthusiast fix the throttle position sensor/switch '1' circuit high input problem in a 2012 Nissan Versa?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to tackle sensor replacement, wiring repairs, or other related tasks to address the P0123 code.

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