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Engine-Codes – Nissan – P0122 2010 Nissan Sentra

P0122 2010 Nissan Sentra Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The P0122 diagnostic trouble code (DTC) for a 2010 Nissan Sentra indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit Low Input. Common causes include Faulty throttle position sensor, Damaged or corroded wiring harness, Poor electrical connection between the TPS and ECU. 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
P0122 2010 Nissan Sentra indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged or corroded wiring harness, Poor electrical connection between the TPS and ECU.
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 P0122 2010 Nissan Sentra Description

The P0122 diagnostic trouble code (DTC) for a 2010 Nissan Sentra indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit Low 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 signals to the engine control unit (ECU) to adjust fuel delivery and ignition timing accordingly. When the TPS reports a low input signal to the ECU, it means that the voltage signal from the sensor is lower than expected, potentially indicating a fault in the sensor itself, the wiring connecting it to the ECU, or the ECU's ability to interpret the signal accurately.

OBDII Code P0122 2010 Nissan Sentra - Throttle Position Sensor/Switch 'A' Circuit Low Input
P0122 2010 Nissan Sentra Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Common Causes of P0122 2010 Nissan Sentra

  1. Faulty throttle position sensor
  2. Damaged or corroded wiring harness
  3. Poor electrical connection between the TPS and ECU
  4. Issues with the ECU's ability to interpret TPS signals
  5. Environmental factors such as moisture or debris affecting sensor performance

Symptoms of P0122 2010 Nissan Sentra

  1. Rough idling or stalling
  2. Hesitation or lack of response during acceleration
  3. Poor fuel efficiency
  4. Engine misfires
  5. Illumination of the check engine light

How to Fix P0122 2010 Nissan Sentra

  1. Begin by conducting a thorough inspection of the throttle position sensor and its wiring harness to check for any visible damage or corrosion.
  2. Test the TPS using a multimeter to verify its functionality and compare the readings to manufacturer specifications.
  3. If the TPS is faulty, replace it with a new sensor and ensure proper calibration.
  4. Check and repair any damaged wiring or connectors in the TPS circuit.
  5. Clear the DTC from the ECU memory and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0122 2010 Nissan Sentra

The typical repair costs for addressing a P0122 code on a 2010 Nissan Sentra can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary significantly, with hourly rates typically ranging between $80 and $150. Factors such as location, vehicle make and model, and engine type can also impact the overall repair costs. For a more accurate estimate, it's recommended to consult with local auto repair shops or dealerships.

When is the Code Detected?

An excessively low voltage from the Throttle Position Sensor (TPS) 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 P0122 2010 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0122 in a 2010 Nissan Sentra?

The common symptoms of OBDII code P0122 in a 2010 Nissan Sentra include issues with acceleration, poor engine performance, stalling, and potential difficulty shifting gears.

2. What does the OBDII code P0122 for a 2010 Nissan Sentra indicate?

The OBDII code P0122 for a 2010 Nissan Sentra indicates a Throttle Position Sensor/Switch 'A' Circuit Low Input, meaning there's a problem with the signal from the throttle position sensor being lower than expected.

3. What are the possible causes of OBDII code P0122 in a 2010 Nissan Sentra?

Possible causes of OBDII code P0122 in a 2010 Nissan Sentra include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

4. How can I diagnose the OBDII code P0122 in my 2010 Nissan Sentra?

To diagnose OBDII code P0122 in a 2010 Nissan Sentra, you can use an OBDII scanner to read the trouble code, check the throttle position sensor for proper operation, inspect the sensor's wiring and connectors for damage, and test the sensor's voltage output.

5. Can I still drive my 2010 Nissan Sentra with OBDII code P0122?

It's not recommended to drive your 2010 Nissan Sentra with OBDII code P0122, as it can lead to poor engine performance, potential stalling, and other safety hazards. It's best to address the issue promptly.

6. How do I repair OBDII code P0122 in my 2010 Nissan Sentra?

To repair OBDII code P0122 in a 2010 Nissan Sentra, you may need to replace the throttle position sensor, repair any damaged wiring or connectors, or reprogram the engine control module (ECM) if needed.

7. Is it possible to reset OBDII code P0122 in my 2010 Nissan Sentra without fixing the issue?

Resetting OBDII code P0122 in a 2010 Nissan Sentra without fixing the underlying issue may temporarily clear the code, but it will likely reappear once the problem persists. It's best to address the root cause of the code.

8. How much does it cost to fix OBDII code P0122 in a 2010 Nissan Sentra?

The cost to fix OBDII code P0122 in a 2010 Nissan Sentra can vary depending on the specific cause of the issue. Replacing a throttle position sensor can range from $50 to $200, while repairing wiring or connectors may be less expensive.

9. Can a DIY enthusiast fix OBDII code P0122 in a 2010 Nissan Sentra?

A DIY enthusiast with the right tools and knowledge may be able to fix OBDII code P0122 in a 2010 Nissan Sentra by replacing the throttle position sensor or repairing wiring issues. However, it's essential to ensure proper diagnosis and repair procedures.

10. How often does OBDII code P0122 occur in a 2010 Nissan Sentra?

OBDII code P0122 can occur in a 2010 Nissan Sentra due to various reasons, including sensor wear or damage, electrical issues, or ECM malfunctions. The frequency of occurrence can vary depending on driving conditions and maintenance history.

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