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P2128 2007 Nissan Pathfinder Code - Accelerator Pedal Position Sensor Circuit

Quick Answer

The P2128 diagnostic trouble code (DTC) for a 2007 Nissan Pathfinder refers to an issue with the Accelerator Pedal Position Sensor Circuit. Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the accelerator pedal position sensor circuit, Corrosion or damage to the sensor or wiring. 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 2007 Nissan Pathfinder indicates Accelerator Pedal Position Sensor Circuit.
Common causes
Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the accelerator pedal position sensor circuit, Corrosion or damage to the sensor or wiring.
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 P2128 2007 Nissan Pathfinder Description

The P2128 diagnostic trouble code (DTC) for a 2007 Nissan Pathfinder refers to an issue with the Accelerator Pedal Position Sensor Circuit. This code indicates that there is a problem with the electrical circuit that controls the accelerator pedal position sensor. The accelerator pedal position sensor is a vital component of the vehicle's electronic throttle control system, which is responsible for determining the position of the accelerator pedal and sending this information to the engine control module (ECM). The ECM uses this data to adjust the throttle opening and control the engine's performance.

OBDII Code P2128 2007 Nissan Pathfinder - Accelerator Pedal Position Sensor Circuit
P2128 2007 Nissan Pathfinder Code - Accelerator Pedal Position Sensor Circuit

Common Causes of P2128 2007 Nissan Pathfinder

  1. Faulty accelerator pedal position sensor
  2. Wiring or connector issues in the accelerator pedal position sensor circuit
  3. Corrosion or damage to the sensor or wiring
  4. ECM software or hardware issues
  5. Mechanical issues with the accelerator pedal assembly

Symptoms of P2128 2007 Nissan Pathfinder

  1. Reduced engine power
  2. Unresponsive throttle
  3. Engine stalling or hesitation
  4. Illumination of the Check Engine Light
  5. Poor fuel economy

How to Fix P2128 2007 Nissan Pathfinder

  1. Begin by diagnosing the specific cause of the P2128 code using a scan tool to read the code and identify the underlying issue.
  2. Inspect the accelerator pedal position sensor, wiring, and connectors for any signs of damage, corrosion, or loose connections.
  3. Test the sensor's voltage output using a multimeter to determine if it is functioning within the manufacturer's specified range.
  4. If the sensor is faulty, replace it with a new one following the manufacturer's guidelines.
  5. Clear the DTC from the ECM's memory and perform a test drive to ensure that the issue has been resolved.

Cost to Fix P2128 2007 Nissan Pathfinder

The typical repair costs for addressing a P2128 code on a 2007 Nissan Pathfinder can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, factors such as location, vehicle make and model, and engine type can also influence the overall repair costs.

When is the Code Detected?

An excessively low voltage from the APP sensor 2 is sent to 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 P2128 2007 Nissan Pathfinder Code

1. What are common symptoms of OBDII code P2128 in a 2007 Nissan Pathfinder?

- Common symptoms include reduced engine power, acceleration issues, and the vehicle going into a "limp mode" to prevent further damage.

2. What does the OBDII code P2128 indicate in a 2007 Nissan Pathfinder?

- OBDII code P2128 specifically relates to an issue with the Accelerator Pedal Position Sensor Circuit.

3. What are the possible causes of OBDII code P2128 in a 2007 Nissan Pathfinder?

- Possible causes include a faulty accelerator pedal position sensor, wiring or connector issues, or a problem with the engine control module.

4. How can I diagnose the OBDII code P2128 in my 2007 Nissan Pathfinder?

- Diagnosing this code typically involves using a scan tool to retrieve the code, checking the wiring and connections related to the accelerator pedal position sensor, and testing the sensor itself for proper operation.

5. Can I continue driving my 2007 Nissan Pathfinder with OBDII code P2128?

- It is not recommended to continue driving with this code present, as it can lead to further engine or drivability issues.

6. How can I repair OBDII code P2128 in my 2007 Nissan Pathfinder?

- Repair options may include replacing the accelerator pedal position sensor, repairing any damaged wiring or connectors, or reprogramming the engine control module.

7. Will resetting the OBDII code P2128 in my 2007 Nissan Pathfinder fix the issue?

- Simply resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code to trigger.

8. Can a DIY enthusiast fix OBDII code P2128 in a 2007 Nissan Pathfinder?

- Depending on the level of expertise and access to tools, some DIY enthusiasts may be able to address this issue themselves by following proper diagnostic and repair procedures.

9. How much does it typically cost to repair OBDII code P2128 in a 2007 Nissan Pathfinder?

- The cost of repair can vary based on the specific cause of the issue, but it may involve parts and labor expenses ranging from $100 to $300 or more.

10. Is OBDII code P2128 a common problem in 2007 Nissan Pathfinders?

- While not extremely common, issues related to the Accelerator Pedal Position Sensor Circuit can occur in 2007 Nissan Pathfinders and other vehicles, requiring proper diagnosis and repair.

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