AutoCodes – Nissan – P2128 2005 Nissan Altima Sedan

P2128 2005 Nissan Altima Sedan 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 2005 Nissan Altima Sedan 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 3,194

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 2005 Nissan Altima Sedan 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 2005 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit - AutoCodes.com — P2128 2005 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P2128 2005 Nissan Altima Sedan?

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 2005 Nissan Altima Sedan?

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 2005 Nissan Altima Sedan 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.

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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 2005 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2128 in a 2005 Nissan Altima Sedan?

- Common symptoms include issues with acceleration, reduced engine power, stalling, and illuminated Check Engine light.

2. What does OBDII code P2128 on a 2005 Nissan Altima Sedan indicate?

- OBDII code P2128 indicates a problem with the Accelerator Pedal Position Sensor Circuit.

3. What are the possible causes of OBDII code P2128 in a 2005 Nissan Altima Sedan?

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

4. How can I diagnose the issue causing OBDII code P2128 in my 2005 Nissan Altima Sedan?

- Diagnosing the issue may involve checking the accelerator pedal position sensor's wiring, testing the sensor's voltage, and using a scan tool to read live data.

5. Is it safe to continue driving my 2005 Nissan Altima Sedan with OBDII code P2128?

- It is not recommended to drive the vehicle with OBDII code P2128 as it can lead to performance issues and potential safety concerns.

6. Can I repair OBDII code P2128 in my 2005 Nissan Altima Sedan myself?

- Repairing OBDII code P2128 may require technical knowledge and tools. It is advisable to consult a professional mechanic for accurate diagnosis and repair.

7. How much does it typically cost to repair OBDII code P2128 in a 2005 Nissan Altima Sedan?

- The cost of repairing OBDII code P2128 can vary depending on the exact cause of the issue, parts needed, and labor costs. It is recommended to get a few quotes from reputable repair shops.

8. Will resetting the Check Engine light resolve OBDII code P2128 in my 2005 Nissan Altima Sedan?

- Resetting the Check Engine light may temporarily turn off the light, but it will not fix the underlying issue causing OBDII code P2128.

9. Can a dirty throttle body cause OBDII code P2128 in a 2005 Nissan Altima Sedan?

- While a dirty throttle body can affect engine performance, it is not typically the cause of OBDII code P2128. Focus on checking the accelerator pedal position sensor and related components.

10. How often should I replace the accelerator pedal position sensor in a 2005 Nissan Altima Sedan to prevent OBDII code P2128?

- The accelerator pedal position sensor does not have a specific replacement interval. However, regular maintenance and prompt attention to any issues can help prevent OBDII code P2128.