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Engine-Codes – Nissan – P0122 2005 Nissan Sentra

P0122 2005 Nissan Sentra Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Quick Answer

The P0122 code on a 2005 Nissan Sentra indicates a problem with the Throttle Position Sensor/Switch '1' Circuit having a low input. Common causes include Faulty throttle position sensor, Damaged wiring or connectors leading to the TPS, Misaligned throttle position sensor. 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 2005 Nissan Sentra indicates Throttle Position Sensor/Switch '1' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors leading to the TPS, Misaligned throttle position sensor.
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
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Code P0122 2005 Nissan Sentra Description

The P0122 code on a 2005 Nissan Sentra indicates a problem with the Throttle Position Sensor/Switch '1' Circuit having a low input. The throttle position sensor (TPS) is a crucial component of the engine management system as it monitors the position of the throttle valve and sends this information to the Engine Control Module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing for optimal engine performance. When the TPS signal is lower than expected, it can cause various issues with the vehicle's performance.

OBDII Code P0122 2005 Nissan Sentra - Throttle Position Sensor/Switch '1' Circuit Low Input
P0122 2005 Nissan Sentra Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Common Causes of P0122 2005 Nissan Sentra

  1. Faulty throttle position sensor.
  2. Damaged wiring or connectors leading to the TPS.
  3. Misaligned throttle position sensor.
  4. Issues with the Engine Control Module (ECM).
  5. Environmental factors such as moisture or corrosion affecting the sensor.

Symptoms of P0122 2005 Nissan Sentra

  1. Poor acceleration or lack of response when pressing the gas pedal.
  2. Rough idling or stalling when coming to a stop.
  3. Engine misfires or hesitation during acceleration.
  4. Check Engine Light illuminated on the dashboard.

How to Fix P0122 2005 Nissan Sentra

  1. Begin by diagnosing the issue using a diagnostic scanner to confirm the P0122 code and check the TPS signal.
  2. Inspect the wiring and connectors leading to the TPS for any damage or corrosion. Repair or replace as necessary.
  3. Test the throttle position sensor for proper operation and alignment. Adjust or replace if needed.
  4. Clear the error code from the ECM and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, consider seeking professional help to further diagnose and repair any underlying issues.

Cost to Fix P0122 2005 Nissan Sentra

The typical repair costs for addressing a Throttle Position Sensor/Switch '1' Circuit Low Input issue can range from $100 to $300, depending on the severity of the problem and the need for parts replacement. This estimate includes the cost of a new throttle position sensor, wiring repairs, and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your specific vehicle and location.

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 2005 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0122 in a 2005 Nissan Sentra?

- Common symptoms include poor acceleration, rough idling, stalling, and a decrease in fuel efficiency.

2. What are the possible causes of OBDII code P0122 in a 2005 Nissan Sentra?

- The most common causes are a faulty throttle position sensor, damaged wiring or connectors related to the sensor, or a problem with the engine control module.

3. How can I diagnose the issue causing OBDII code P0122 in my 2005 Nissan Sentra?

- You can use a scan tool to check the throttle position sensor's data, inspect the wiring and connectors for any damage, and perform a visual inspection of the sensor itself.

4. Can I still drive my 2005 Nissan Sentra with OBDII code P0122?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions.

5. How can I repair OBDII code P0122 in my 2005 Nissan Sentra?

- The most common repair is to replace the throttle position sensor. Ensure proper installation and calibration of the new sensor to resolve the issue.

6. Are there any DIY tips for fixing OBDII code P0122 in a 2005 Nissan Sentra?

- While replacing the throttle position sensor is relatively straightforward, it's recommended to consult a repair manual or seek professional help for accurate diagnosis and repair.

7. Will resetting the OBDII code P0122 in my 2005 Nissan Sentra make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing P0122 is not fixed, the code is likely to reappear.

8. How much does it cost to repair OBDII code P0122 in a 2005 Nissan Sentra?

- The cost of repairing P0122 can vary depending on the labor rates and parts prices in your area. Generally, replacing the throttle position sensor can cost between $100 to $300.

9. Can a dirty throttle body cause OBDII code P0122 in a 2005 Nissan Sentra?

- While a dirty throttle body can affect sensor readings, it is not typically the primary cause of P0122. However, it's good practice to clean the throttle body during maintenance.

10. Is it possible for other issues to trigger OBDII code P0122 in a 2005 Nissan Sentra?

- While less common, issues such as a vacuum leak, fuel delivery problems, or a malfunctioning accelerator pedal position sensor can also trigger code P0122.

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