AutoCodes – Nissan – P2128 2003 Nissan Altima Sedan

P2128 2003 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 2003 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 4,793

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 2003 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 2003 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit - AutoCodes.com — P2128 2003 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P2128 2003 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 2003 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 2003 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 2003 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 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.