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Engine-Codes – Nissan – P2128 2003 Nissan Altima Sedan

P2128 2003 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit

Quick Answer

The P2128 code for a 2003 Nissan Altima Sedan relates to the Accelerator Pedal Position Sensor Circuit. Common causes include Worn-out or damaged accelerator pedal position sensor, Corrosion or loose connections in the sensor circuit, Electrical issues such as short circuits or open circuits. 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 2003 Nissan Altima Sedan indicates Accelerator Pedal Position Sensor Circuit.
Common causes
Common causes include Worn-out or damaged accelerator pedal position sensor, Corrosion or loose connections in the sensor circuit, Electrical issues such as short circuits or open circuits.
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 12, 2024
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Code P2128 2003 Nissan Altima Sedan Description

The P2128 code for a 2003 Nissan Altima Sedan relates to the Accelerator Pedal Position Sensor Circuit. This code indicates that there is a problem with the sensor that monitors the position of the accelerator pedal in the vehicle. The accelerator pedal position sensor is a crucial component of the electronic throttle control system, which regulates the amount of air entering the engine based on the driver's input through the accelerator pedal.

OBDII Code P2128 2003 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit
P2128 2003 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit

Common Causes of P2128 2003 Nissan Altima Sedan

  1. Worn-out or damaged accelerator pedal position sensor.
  2. Corrosion or loose connections in the sensor circuit.
  3. Electrical issues such as short circuits or open circuits.
  4. Faulty wiring harness or connectors.
  5. Issues with the electronic throttle control system.

Symptoms of P2128 2003 Nissan Altima Sedan

  1. Hesitation or lack of response when pressing the accelerator pedal.
  2. Rough idling or fluctuating engine RPMs.
  3. Stalling or difficulty starting the engine.
  4. Limp mode activation, limiting the vehicle's speed and power.
  5. Illumination of the Check Engine Light on the dashboard.

How to Fix P2128 2003 Nissan Altima Sedan

  1. Begin by diagnosing the specific cause of the P2128 code using a diagnostic scanner to pinpoint the exact issue.
  2. Inspect the accelerator pedal position sensor and its wiring for any signs of damage, corrosion, or loose connections.
  3. Replace the accelerator pedal position sensor if it is found to be faulty or worn out.
  4. Repair or replace any damaged wiring harnesses or connectors in the sensor circuit.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2128 2003 Nissan Altima Sedan

The typical repair costs for addressing a P2128 code on a 2003 Nissan Altima Sedan can vary depending on the specific cause of the issue. Generally, replacing the accelerator pedal position sensor and addressing any related wiring or electrical issues can range from $150 to $400 in 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 based on your location and vehicle specifics.

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 2003 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2128 on a 2003 Nissan Altima Sedan?

The common symptoms of OBDII code P2128 include a lack of responsiveness from the accelerator pedal, reduced engine power, and potentially stalling or rough idling.

2. What is the main cause of OBDII code P2128 on a 2003 Nissan Altima Sedan?

The main cause of OBDII code P2128 on a 2003 Nissan Altima Sedan is typically a faulty accelerator pedal position sensor or a related wiring issue.

3. How can I diagnose the issue causing OBDII code P2128 on my 2003 Nissan Altima Sedan?

To diagnose the issue causing OBDII code P2128, you can use a scan tool to check for any additional trouble codes, visually inspect the wiring and connections related to the accelerator pedal position sensor, and test the sensor itself for proper functionality.

4. Can a DIY enthusiast repair OBDII code P2128 on a 2003 Nissan Altima Sedan?

While some DIY enthusiasts may be able to tackle the repair for OBDII code P2128, it is recommended to have a professional mechanic diagnose and repair the issue due to the complexity of the accelerator pedal position sensor circuit.

5. How much does it typically cost to repair OBDII code P2128 on a 2003 Nissan Altima Sedan?

The cost of repairing OBDII code P2128 on a 2003 Nissan Altima Sedan can vary depending on the exact cause of the issue and labor rates in your area. It's best to get a few quotes from local mechanics for an accurate estimate.

6. Can driving with OBDII code P2128 on a 2003 Nissan Altima Sedan cause further damage?

Continuing to drive with OBDII code P2128 on a 2003 Nissan Altima Sedan can potentially cause further damage to the engine or other components, as the reduced engine power and lack of proper acceleration can put additional strain on the vehicle.

7. Is it safe to reset the OBDII code P2128 on a 2003 Nissan Altima Sedan using a scan tool?

While resetting the OBDII code P2128 using a scan tool may temporarily turn off the check engine light, the underlying issue causing the code will still be present. It's best to diagnose and repair the problem to prevent further issues.

8. Are there any recalls or technical service bulletins related to OBDII code P2128 on a 2003 Nissan Altima Sedan?

It's recommended to check with a Nissan dealership or online resources to see if there are any recalls or technical service bulletins related to OBDII code P2128 on a 2003 Nissan Altima Sedan, as manufacturers sometimes provide assistance for known issues.

9. Can extreme weather conditions affect the likelihood of OBDII code P2128 occurring on a 2003 Nissan Altima Sedan?

Extreme weather conditions, such as extreme heat or cold, can potentially impact the performance of the accelerator pedal position sensor and increase the likelihood of OBDII code P2128 occurring on a 2003 Nissan Altima Sedan.

10. How long does it typically take to repair OBDII code P2128 on a 2003 Nissan Altima Sedan?

The repair time for OBDII code P2128 on a 2003 Nissan Altima Sedan can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day for a mechanic to diagnose and repair the problem.

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