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P2128 Nissan Code - Accelerator Pedal Position Sensor Circuit

Quick Answer

The P2128 code in a Nissan vehicle indicates a problem with the Accelerator Pedal Position Sensor Circuit. Common causes include Faulty Accelerator Pedal Position Sensor, Wiring issues such as shorts or breaks in the circuit, Corrosion or poor connections in the sensor 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
P2128 Nissan indicates Accelerator Pedal Position Sensor Circuit.
Common causes
Common causes include Faulty Accelerator Pedal Position Sensor, Wiring issues such as shorts or breaks in the circuit, Corrosion or poor connections in the sensor 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 09, 2024
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Code P2128 Nissan Description

The P2128 code in a Nissan vehicle indicates a problem with the Accelerator Pedal Position Sensor Circuit. This sensor is responsible for monitoring the position of the accelerator pedal and sending this information to the Engine Control Module (ECM) to adjust fuel delivery and engine timing accordingly. When this circuit malfunctions, it can lead to issues with engine performance, fuel efficiency, and overall drivability.

OBDII Code P2128 Nissan - Accelerator Pedal Position Sensor Circuit
P2128 Nissan Code - Accelerator Pedal Position Sensor Circuit

Common Causes of P2128 Nissan

  1. Faulty Accelerator Pedal Position Sensor
  2. Wiring issues such as shorts or breaks in the circuit
  3. Corrosion or poor connections in the sensor circuit
  4. ECM malfunction or software glitch
  5. Environmental factors such as moisture or debris affecting the sensor

Symptoms of P2128 Nissan

  1. Loss of power or acceleration
  2. Engine hesitation or surging
  3. Illumination of the Check Engine Light
  4. Reduced fuel efficiency
  5. Difficulty maintaining a steady speed

How to Fix P2128 Nissan

  1. Diagnose the issue by using a scan tool to read the code and perform a thorough inspection of the sensor and related wiring.
  2. Test the Accelerator Pedal Position Sensor using a multimeter to check for proper voltage and resistance.
  3. Replace the sensor if it is found to be faulty, ensuring that the new sensor is properly calibrated.
  4. Repair any damaged wiring or connections in the circuit.
  5. Clear the code from the ECM's memory and perform a test drive to ensure the issue has been resolved.

Cost to Fix P2128 Nissan

The cost of repairing a P2128 code in a Nissan vehicle can vary depending on the specific model and year of the car, as well as the extent of the issue. Typically, the cost of replacing the Accelerator Pedal Position Sensor ranges from $100 to $300, while the labor cost for diagnosis and repair can add another $100 to $200. Overall, you can expect to pay anywhere from $200 to $500 for this repair at a reputable auto repair shop. It is recommended to get a few quotes from different shops to compare prices and ensure a fair deal.

When is the Code Detected?

An excessively low voltage from the APP sensor 2 is sent to ECM.

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Information for Specific Nissan Models

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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