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Engine-Codes – Nissan – P0122 2005 Nissan Maxima

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

Quick Answer

The P0122 diagnostic trouble code (DTC) for a 2005 Nissan Maxima indicates an issue with the Throttle Position Sensor/Switch '1' Circuit Low Input. Common causes include Faulty throttle position sensor, Damaged or corroded wiring/connectors in the TPS circuit, Issues with the 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 2005 Nissan Maxima indicates Throttle Position Sensor/Switch '1' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged or corroded wiring/connectors in the TPS circuit, Issues with the 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 12, 2024
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Code P0122 2005 Nissan Maxima Description

The P0122 diagnostic trouble code (DTC) for a 2005 Nissan Maxima indicates an issue with the Throttle Position Sensor/Switch '1' Circuit Low Input. The throttle position sensor (TPS) is a crucial component in the vehicle's fuel injection system, as it monitors the throttle's position and sends signals to the engine control unit (ECU) to adjust the air-fuel mixture for optimal performance. When the TPS detects that the throttle position is outside the expected range or that the signal voltage is too low, it triggers the P0122 code.

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

Common Causes of P0122 2005 Nissan Maxima

  1. Faulty throttle position sensor
  2. Damaged or corroded wiring/connectors in the TPS circuit
  3. Issues with the ECU
  4. Vacuum leaks in the intake system
  5. Dirty throttle body

Symptoms of P0122 2005 Nissan Maxima

  1. Rough idling
  2. Stalling or hesitation when accelerating
  3. Poor fuel efficiency
  4. Lack of power or response from the engine
  5. Check Engine Light illuminated on the dashboard

How to Fix P0122 2005 Nissan Maxima

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the trouble codes and confirm the presence of P0122.
  2. Inspect the throttle position sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components as needed.
  3. Perform a thorough inspection of the intake system for vacuum leaks and address any leaks found.
  4. Clean the throttle body to ensure proper airflow and operation.
  5. Clear the trouble codes from the ECU's memory and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0122 2005 Nissan Maxima

The typical repair costs for addressing a P0122 code on a 2005 Nissan Maxima can vary depending on the specific cause of the issue. Replacement of a faulty throttle position sensor can range from $50 to $200, while addressing wiring or connector issues may add additional labor costs. Overall, the total repair costs for this issue can range from $100 to $400, including parts and labor. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific diagnosis and repair requirements for your vehicle.

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 Maxima Code

1. What are the common symptoms of OBDII code P0122 on a 2005 Nissan Maxima?

- Common symptoms include decreased engine performance, stalling, rough idling, and issues with acceleration.

2. What does the Throttle Position Sensor/Switch '1' Circuit Low Input error code (P0122) indicate?

- This code indicates that the throttle position sensor is sending a lower than expected voltage signal to the Engine Control Module (ECM).

3. What are the possible causes of the P0122 code on a 2005 Nissan Maxima?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, or a problem with the ECM.

4. How can I diagnose the Throttle Position Sensor/Switch '1' Circuit Low Input error code?

- Diagnosing the issue involves checking the throttle position sensor's voltage output using a multimeter and inspecting the sensor and its wiring for any visible damage.

5. Can driving with the P0122 code on a 2005 Nissan Maxima cause further damage?

- Driving with this code may lead to poor engine performance and fuel efficiency, and could potentially cause further damage if left unresolved for an extended period.

6. How can I repair the P0122 error code on my 2005 Nissan Maxima?

- Repair options include replacing the throttle position sensor, repairing damaged wiring or connectors, or resetting the ECM after addressing any underlying issues.

7. Is it safe to continue driving my 2005 Nissan Maxima with the P0122 code present?

- It is not recommended to drive the vehicle with this code present, as it can lead to potential safety hazards and further damage to the engine.

8. Will resetting the OBDII code P0122 on a 2005 Nissan Maxima make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the P0122 code is not addressed, it is likely to reappear.

9. How much does it typically cost to replace a throttle position sensor on a 2005 Nissan Maxima?

- The cost of replacing a throttle position sensor can vary depending on the vehicle's location, the specific sensor needed, and whether you choose to do the replacement yourself or have a professional do it.

10. Are there any preventive measures to avoid encountering the P0122 code in the future?

- Regularly inspecting and maintaining the throttle position sensor, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the recurrence of the P0122 code.

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