AutoCodes – Nissan – P2128 2012 Nissan Altima Sedan

P2128 2012 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 2012 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 2,543

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 2012 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 2012 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit - AutoCodes.com — P2128 2012 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P2128 2012 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 2012 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 2012 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 2012 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 2012 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2128 in a 2012 Nissan Altima Sedan?

- Common symptoms include reduced engine power, intermittent acceleration issues, and the vehicle going into "limp mode."

2. What causes the OBDII code P2128 in a 2012 Nissan Altima Sedan?

- The code P2128 is typically triggered by a malfunction in the accelerator pedal position sensor circuit.

3. How serious is the OBDII code P2128 in a 2012 Nissan Altima Sedan?

- The code P2128 can affect the drivability of the vehicle, causing potential safety concerns. It is recommended to address this issue promptly.

4. Can driving with OBDII code P2128 in a 2012 Nissan Altima Sedan cause further damage?

- Continuing to drive with code P2128 may lead to further issues, such as reduced fuel efficiency and potential damage to other components in the vehicle.

5. How can the accelerator pedal position sensor circuit be repaired in a 2012 Nissan Altima Sedan with OBDII code P2128?

- Repairing the accelerator pedal position sensor circuit may involve replacing the sensor itself or repairing any damaged wiring or connections.

6. Is it possible to reset the OBDII code P2128 in a 2012 Nissan Altima Sedan without fixing the underlying issue?

- While clearing the code may temporarily turn off the check engine light, the underlying issue causing code P2128 will persist until repaired.

7. Can a DIY enthusiast fix the OBDII code P2128 in a 2012 Nissan Altima Sedan?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the accelerator pedal position sensor circuit issue.

8. What are the potential costs associated with repairing OBDII code P2128 in a 2012 Nissan Altima Sedan?

- The cost of repairing code P2128 can vary depending on the extent of the issue, but it may involve expenses for parts and labor if professional help is required.

9. Are there any preventive measures to avoid OBDII code P2128 in a 2012 Nissan Altima Sedan?

- Regular maintenance, such as checking the accelerator pedal sensor and related components during scheduled services, can help prevent issues that lead to code P2128.

10. How long does it typically take to repair the accelerator pedal position sensor circuit for OBDII code P2128 in a 2012 Nissan Altima Sedan?

- The repair time can vary based on the exact cause of the issue and the availability of parts, but it may take a few hours to a day for a professional technician to address the problem.