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Engine-Codes – Nissan – P0123 2010 Nissan Altima Sedan

P0123 2010 Nissan Altima Sedan Code - Throttle Position Sensor/Switch '1' Circuit High Input

Quick Answer

The P0123 diagnostic trouble code (DTC) specifically refers to the Throttle Position Sensor/Switch '1' Circuit High Input in a 2010 Nissan Altima Sedan. Common causes include Worn or faulty throttle position sensor, Dirty or contaminated TPS causing erratic signals, Wiring issues such as shorts or open circuits in the TPS circuit. 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 2010 Nissan Altima Sedan indicates Throttle Position Sensor/Switch '1' Circuit High Input.
Common causes
Common causes include Worn or faulty throttle position sensor, Dirty or contaminated TPS causing erratic signals, Wiring issues such as shorts or open circuits in the TPS circuit.
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 2010 Nissan Altima Sedan Description

The P0123 diagnostic trouble code (DTC) specifically refers to the Throttle Position Sensor/Switch '1' Circuit High Input in a 2010 Nissan Altima Sedan. In simpler terms, this code indicates that the Engine Control Module (ECM) has detected a higher than expected voltage signal from the throttle position sensor (TPS) or throttle position switch. The TPS is a crucial component in the vehicle's fuel management system, as it informs the ECM about the position of the throttle valve. This information is used to adjust the air-fuel mixture for optimal engine performance and fuel efficiency.

OBDII Code P0123 2010 Nissan Altima Sedan - Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2010 Nissan Altima Sedan Code - Throttle Position Sensor/Switch '1' Circuit High Input

Common Causes of P0123 2010 Nissan Altima Sedan

  1. Worn or faulty throttle position sensor.
  2. Dirty or contaminated TPS causing erratic signals.
  3. Wiring issues such as shorts or open circuits in the TPS circuit.
  4. ECM software or hardware malfunction.
  5. Corrosion in electrical connections related to the TPS.

Symptoms of P0123 2010 Nissan Altima Sedan

  1. Poor acceleration or hesitation during throttle response.
  2. Rough idling or stalling when coming to a stop.
  3. Reduced fuel efficiency or increased fuel consumption.
  4. Check Engine Light (CEL) illuminated on the dashboard.
  5. Limited engine power or limp mode activation.

How to Fix P0123 2010 Nissan Altima Sedan

  1. Diagnose the issue using an OBD-II scanner to confirm the P0123 code.
  2. Inspect the throttle position sensor for any visible damage or contamination.
  3. Test the TPS using a multimeter to check for proper voltage readings.
  4. Check the wiring harness for any signs of damage, corrosion, or loose connections.
  5. Replace the throttle position sensor if it fails testing, and clear the DTC to reset the ECM.

Cost to Fix P0123 2010 Nissan Altima Sedan

The typical repair costs for addressing a Throttle Position Sensor/Switch '1' Circuit High Input issue in a 2010 Nissan Altima Sedan can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary significantly based on various factors. It's recommended to consult with local repair shops or dealerships for a more accurate estimate based on the specific circumstances.

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 2010 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0123 in a 2010 Nissan Altima Sedan?

- Common symptoms include issues like lack of power, delayed throttle response, stalling, and in some cases, the vehicle may even go into limp mode.

2. What does the Throttle Position Sensor/Switch '1' Circuit High Input mean in relation to code P0123 in a 2010 Nissan Altima Sedan?

- This code indicates that the Engine Control Module (ECM) has detected a higher than expected voltage from the throttle position sensor or its circuit.

3. What are the potential causes of OBDII code P0123 in a 2010 Nissan Altima Sedan?

- The main causes can be a faulty throttle position sensor, a short or open circuit in the sensor wiring, or issues with the ECM itself.

4. How serious is OBDII code P0123 in a 2010 Nissan Altima Sedan?

- While the vehicle may still be operable with this code, it is essential to address it promptly to avoid potential safety hazards and further damage to the engine.

5. Can driving with OBDII code P0123 in a 2010 Nissan Altima Sedan damage the vehicle?

- Continued driving with this code may lead to poor fuel efficiency, engine misfires, and potential long-term damage to the engine components.

6. How can I diagnose OBDII code P0123 in a 2010 Nissan Altima Sedan?

- Diagnosis typically involves using a scan tool to retrieve the code, testing the throttle position sensor's voltage, and inspecting the sensor and its wiring for any visible damage.

7. What are some DIY repair tips for fixing OBDII code P0123 in a 2010 Nissan Altima Sedan?

- DIY repair options include checking and cleaning the throttle body, inspecting the throttle position sensor's connector for corrosion, and testing the sensor's resistance.

8. Is it recommended to replace the throttle position sensor when dealing with OBDII code P0123 in a 2010 Nissan Altima Sedan?

- Yes, replacing the throttle position sensor is often the most effective solution to resolve the P0123 code in a 2010 Nissan Altima Sedan.

9. Are there any recalls related to OBDII code P0123 in a 2010 Nissan Altima Sedan?

- It's advisable to check with Nissan or the National Highway Traffic Safety Administration (NHTSA) for any recalls or technical service bulletins related to this specific issue.

10. How much can I expect to pay for professional repair of OBDII code P0123 in a 2010 Nissan Altima Sedan?

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

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