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P1120 Nissan Code - Secondary Throttle Position Sensor

Quick Answer

The P1120 code for Nissan vehicles indicates a problem with the Secondary Throttle Position Sensor. Common causes include Faulty Secondary Throttle Position Sensor: The sensor itself may be defective or damaged, causing it to send incorrect signals to the ECM, Wiring Issues: Corrosion, fraying, or short circuits in the wiring connected to the sensor can disrupt the signal transmission, Poor Electrical Connection: Loose or poor connections between the sensor and the ECM can result in intermittent signal loss. 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
P1120 Nissan indicates Secondary Throttle Position Sensor.
Common causes
Common causes include Faulty Secondary Throttle Position Sensor: The sensor itself may be defective or damaged, causing it to send incorrect signals to the ECM, Wiring Issues: Corrosion, fraying, or short circuits in the wiring connected to the sensor can disrupt the signal transmission, Poor Electrical Connection: Loose or poor connections between the sensor and the ECM can result in intermittent signal loss.
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 09, 2024
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Code P1120 Nissan Description

The P1120 code for Nissan vehicles indicates a problem with the Secondary Throttle Position Sensor. This sensor is responsible for monitoring the position of the throttle in relation to the engine's intake manifold. It plays a crucial role in ensuring the proper air-fuel mixture for combustion in the engine. When the sensor fails or malfunctions, it can lead to a variety of performance issues and potential long-term damage if not addressed promptly.

OBDII Code P1120 Nissan - Secondary Throttle Position Sensor
P1120 Nissan Code - Secondary Throttle Position Sensor

Common Causes of P1120 Nissan

  1. Faulty Secondary Throttle Position Sensor: The sensor itself may be defective or damaged, causing it to send incorrect signals to the ECM.
  2. Wiring Issues: Corrosion, fraying, or short circuits in the wiring connected to the sensor can disrupt the signal transmission.
  3. Poor Electrical Connection: Loose or poor connections between the sensor and the ECM can result in intermittent signal loss.
  4. Throttle Body Malfunction: If the throttle body is dirty, stuck, or malfunctioning, it can affect the sensor's readings and trigger the code.
  5. ECM Malfunction: In rare cases, a malfunction in the Engine Control Module can also lead to the P1120 code.

Symptoms of P1120 Nissan

  1. Poor Acceleration: The vehicle may struggle to accelerate smoothly, especially at higher speeds.
  2. Rough Idling: The engine may idle roughly or inconsistently, causing vibrations in the vehicle.
  3. Stalling: The engine may stall unexpectedly, particularly when coming to a stop or during deceleration.
  4. Decreased Fuel Efficiency: The vehicle may experience a drop in fuel efficiency, requiring more frequent refueling.
  5. Engine Misfires: The engine may misfire, leading to a noticeable loss of power and performance.

How to Fix P1120 Nissan

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and pinpoint the exact cause of the problem.
  2. Inspect the Sensor: Check the Secondary Throttle Position Sensor for any visible damage or signs of malfunction.
  3. Test Wiring and Connections: Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
  4. Replace the Sensor: If the sensor is faulty, replace it with a new, OEM-approved sensor to ensure proper functionality.
  5. Clear Codes and Test Drive: Clear the trouble code from the ECM, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1120 Nissan

The cost of repairing a P1120 code for a Nissan vehicle can vary depending on the specific model, the location of the repair shop, and the labor rates. On average, the parts for a new Secondary Throttle Position Sensor can range from $50 to $150, while the labor cost for the repair can be between $100 and $200. Therefore, the total cost for resolving this issue may fall between $150 and $350. It's advisable to contact local auto repair shops for a more accurate estimate based on your vehicle's make and model.

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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.

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