AutoCodes – Nissan – P2128 2011 Nissan Altima Sedan

P2128 2011 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 2011 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 2,276

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 2011 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 2011 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit - AutoCodes.com — P2128 2011 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P2128 2011 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 2011 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 2011 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 2011 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2128 in a 2011 Nissan Altima Sedan?

Symptoms may include reduced engine power, unresponsive throttle, illuminated Check Engine Light, and limited acceleration capability.

2. What is the main cause of OBDII code P2128 in a 2011 Nissan Altima Sedan?

The primary cause is a malfunction or failure in the accelerator pedal position sensor circuit.

3. How can I diagnose the issue related to OBDII code P2128 in my 2011 Nissan Altima Sedan?

Diagnosis involves checking the wiring, connections, and components related to the accelerator pedal position sensor for any damage or faults using a diagnostic scanner.

4. Can a faulty accelerator pedal position sensor be repaired, or does it need to be replaced?

In most cases, a faulty accelerator pedal position sensor will need to be replaced to resolve the issue and clear the OBDII code P2128.

5. Are there any DIY repair tips for addressing OBDII code P2128 in a 2011 Nissan Altima Sedan?

DIY repair tips include checking for loose connections, inspecting the sensor for physical damage, and ensuring proper wiring connections before considering sensor replacement.

6. Will driving with OBDII code P2128 in a 2011 Nissan Altima Sedan cause further damage to the vehicle?

Continued driving with this issue may result in reduced performance, potential safety hazards, and possible damage to other engine components if left unresolved.

7. How much does it typically cost to repair OBDII code P2128 in a 2011 Nissan Altima Sedan at a mechanic or dealership?

Repair costs can vary depending on the extent of the issue, but generally, replacing the accelerator pedal position sensor may range from $150 to $300, including parts and labor.

8. Can resetting the OBDII system clear the P2128 code temporarily in a 2011 Nissan Altima Sedan?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue with the accelerator pedal position sensor circuit remains unresolved, the code is likely to reappear.

9. Is it safe to drive my 2011 Nissan Altima Sedan with OBDII code P2128 if I experience no noticeable symptoms?

It is not recommended to drive with any unresolved OBDII code, as it may lead to potential safety risks and further damage to the vehicle over time.

10. How long does it typically take to repair OBDII code P2128 in a 2011 Nissan Altima Sedan?

The repair time can vary based on the technician's experience and workload, but replacing the accelerator pedal position sensor usually takes around 1-2 hours at a mechanic's shop.