AutoCodes – Nissan – P2128 2007 Nissan Sentra

P2128 2007 Nissan Sentra 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 2007 Nissan Sentra 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 2,265
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2128 2007 Nissan Sentra 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 2007 Nissan Sentra - Accelerator Pedal Position Sensor Circuit - AutoCodes.com
P2128 2007 Nissan Sentra Code - Accelerator Pedal Position Sensor Circuit

What are the Possible Causes of the DTC P2128 2007 Nissan Sentra?

  • 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 2007 Nissan Sentra?

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 2007 Nissan Sentra 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 2007 Nissan Sentra 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 2007 Nissan Sentra Code

What does OBDII code P2128 mean in a 2007 Nissan Sentra?

P2128 indicates a high voltage issue in the Accelerator Pedal Position (APP) Sensor Circuit 2, which monitors the position of the accelerator pedal.

What are the common symptoms of code P2128 in a 2007 Nissan Sentra?

Symptoms may include reduced engine power, difficulty accelerating, the vehicle entering "limp mode," and the Check Engine Light illuminating.

What causes code P2128 in a 2007 Nissan Sentra?

Possible causes include a faulty accelerator pedal position sensor, damaged or corroded wiring, poor electrical connections, or a malfunctioning engine control module (ECM).

Can I drive my 2007 Nissan Sentra with a P2128 code?

Driving with this code is not recommended, as it may lead to reduced performance and safety risks due to limited acceleration and power.

How do I diagnose P2128 in my 2007 Nissan Sentra?

Start by inspecting the accelerator pedal sensor wiring and connectors for damage or corrosion. Use a multimeter to test the voltage and resistance of the APP sensor. A scan tool can also help confirm the issue.

How much does it cost to fix code P2128 in a 2007 Nissan Sentra?

Repairs can range from $100 to $300, depending on whether the accelerator pedal sensor or wiring needs replacement. Labor costs and diagnostic fees may vary.

How do I reset the Check Engine Light after fixing P2128 in my 2007 Nissan Sentra?

You can reset the light using an OBDII scan tool or by disconnecting the battery for a few minutes. Make sure the issue is resolved before resetting.

Can a dirty throttle body cause a P2128 code?

While unlikely, a dirty throttle body could indirectly affect sensor readings. Cleaning the throttle body may help prevent similar issues.

Do I need to replace the accelerator pedal if I get a P2128 code?

Not always. First, check the wiring and connections. Replace the accelerator pedal assembly only if the sensor is confirmed to be faulty.

How long does it take to fix a P2128 code on a 2007 Nissan Sentra?

Repairs generally take 1-2 hours, depending on the complexity of the issue and whether parts need to be ordered.

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