AutoCodes – Nissan – P2128 2009 Nissan Pathfinder

P2128 2009 Nissan Pathfinder Code - Accelerator Pedal Position Sensor Circuit

Quick Answer

The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) Sensor circuit poor electrical connection. 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 2009 Nissan Pathfinder indicates Accelerator Pedal Position Sensor Circuit.
Common causes: Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) Sensor circuit poor electrical connection.
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.

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Code Popularity 1,710

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2128 2009 Nissan Pathfinder Description

The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position and sends a signal to the Engine Control Module (ECM). Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into an output voltage and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals. Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine operation such as fuel cut.

OBDII Code P2128 2009 Nissan Pathfinder - Accelerator Pedal Position Sensor Circuit - AutoCodes.com — P2128 2009 Nissan Pathfinder Code - Accelerator Pedal Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P2128 2009 Nissan Pathfinder?

Faulty Accelerator Pedal Position (APP) Sensor
Accelerator Pedal Position (APP) Sensor harness is open or shorted
Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)
Electric Throttle Control Actuator(Throttle Body)

How to Fix the DTC P2128 2009 Nissan Pathfinder?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2128 2009 Nissan Pathfinder code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2128 2009 Nissan Pathfinder code?

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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 2009 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P2128 in a 2009 Nissan Pathfinder?

- Common symptoms include a lack of throttle response, reduced engine power, and the illumination of the Check Engine light.

2. What does the OBDII code P2128 indicate in a 2009 Nissan Pathfinder?

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

3. What are the possible causes of OBDII code P2128 in a 2009 Nissan Pathfinder?

- Possible causes include a faulty accelerator pedal position sensor, damaged wiring or connectors in the circuit, or issues with the engine control module (ECM).

4. How can I diagnose the OBDII code P2128 in my 2009 Nissan Pathfinder?

- Diagnosis typically involves using an OBDII scanner to retrieve the trouble code, checking the wiring and connectors for damage, and testing the accelerator pedal position sensor for proper function.

5. Can I drive my 2009 Nissan Pathfinder with OBDII code P2128?

- It is not recommended to drive the vehicle with OBDII code P2128 as it can lead to unsafe driving conditions due to reduced engine power and throttle response.

6. How can I repair OBDII code P2128 in my 2009 Nissan Pathfinder?

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

7. Is it possible to reset OBDII code P2128 in a 2009 Nissan Pathfinder?

- Resetting the code can be done using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. Are there any DIY tips for fixing OBDII code P2128 in a 2009 Nissan Pathfinder?

- While some may attempt to replace the accelerator pedal position sensor themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair.

9. Can a malfunctioning accelerator pedal position sensor cause other issues in a 2009 Nissan Pathfinder?

- Yes, a faulty accelerator pedal position sensor can lead to erratic throttle response, poor fuel efficiency, and potential drivability issues in the vehicle.

10. How much does it typically cost to repair OBDII code P2128 in a 2009 Nissan Pathfinder?

- Repair costs can vary depending on the exact cause of the issue, but replacing the accelerator pedal position sensor can range from $100 to $300, not including labor.