AutoCodes – Nissan – P2128 2008 Nissan Altima Sedan

P2128 2008 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 2008 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 3,734

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 2008 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 2008 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit - AutoCodes.com — P2128 2008 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P2128 2008 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 2008 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 2008 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.

Need more information about the P2128 2008 Nissan Altima Sedan 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 2008 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2128 in a 2008 Nissan Altima Sedan?

The common symptoms of code P2128 include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.

2. What does OBDII code P2128 mean for a 2008 Nissan Altima Sedan?

Code P2128 indicates a problem with the accelerator pedal position sensor circuit in the 2008 Nissan Altima Sedan.

3. What are the potential causes of OBDII code P2128 in a 2008 Nissan Altima Sedan?

Common causes of code P2128 include a faulty accelerator pedal position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

4. How can I diagnose the OBDII code P2128 in my 2008 Nissan Altima Sedan?

Diagnosing code P2128 involves using a scan tool to read the code, checking the accelerator pedal position sensor for proper operation, inspecting related wiring and connectors, and testing the sensor circuit for continuity.

5. Can I drive my 2008 Nissan Altima Sedan with OBDII code P2128?

It is not recommended to drive the vehicle with code P2128 as it can lead to performance issues and potentially unsafe driving conditions. It is best to address the issue promptly.

6. How can I repair OBDII code P2128 in my 2008 Nissan Altima Sedan?

Repairing code P2128 may involve replacing the accelerator pedal position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the engine control module.

7. Are there any DIY tips for fixing OBDII code P2128 in a 2008 Nissan Altima Sedan?

While some simple checks like inspecting wiring and connectors can be done by DIY enthusiasts, diagnosing and repairing code P2128 may require professional help due to the complexity of the accelerator pedal position sensor circuit.

8. Will resetting the OBDII code P2128 in a 2008 Nissan Altima Sedan make it go away permanently?

Simply resetting the code may not permanently resolve the issue causing code P2128. It is important to diagnose the root cause of the problem and address it accordingly to prevent the code from reoccurring.

9. How much does it cost to fix OBDII code P2128 in a 2008 Nissan Altima Sedan?

The cost of fixing code P2128 can vary depending on the specific cause of the issue, the parts needed for repair, and labor costs. It is advisable to get a professional diagnosis to determine an accurate cost estimate.

10. Is OBDII code P2128 a common issue in 2008 Nissan Altima Sedans?

While code P2128 may not be as common as some other OBDII codes, issues with the accelerator pedal position sensor circuit can occur in 2008 Nissan Altima Sedans and require timely attention to prevent further problems.