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P2123 2004 Nissan Maxima Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Quick Answer

The P2123 diagnostic trouble code for a 2004 Nissan Maxima indicates a problem with the Accelerator Pedal Position Sensor Circuit Range/Performance. Common causes include Faulty accelerator pedal position sensor, Wiring issues or damaged connectors in the sensor circuit, Corrosion or poor connections in the sensor circuit. 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
P2123 2004 Nissan Maxima indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty accelerator pedal position sensor, Wiring issues or damaged connectors in the sensor circuit, Corrosion or poor connections in the sensor circuit.
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 17, 2024
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Code P2123 2004 Nissan Maxima Description

The P2123 diagnostic trouble code for a 2004 Nissan Maxima indicates a problem with the Accelerator Pedal Position Sensor Circuit Range/Performance. This sensor is responsible for monitoring the position of the accelerator pedal and sending this information to the Engine Control Module (ECM). The ECM uses this data to determine how much fuel and air to deliver to the engine for optimal performance.

OBDII Code P2123 2004 Nissan Maxima - Accelerator Pedal Position Sensor Circuit Range/Performance
P2123 2004 Nissan Maxima Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Common Causes of P2123 2004 Nissan Maxima

  1. Faulty accelerator pedal position sensor
  2. Wiring issues or damaged connectors in the sensor circuit
  3. Corrosion or poor connections in the sensor circuit
  4. ECM software or hardware issues
  5. Environmental factors such as moisture or heat affecting the sensor

Symptoms of P2123 2004 Nissan Maxima

  1. Reduced engine power
  2. Poor acceleration
  3. Engine stalling
  4. Check Engine Light illuminated
  5. Difficulty maintaining speed

How to Fix P2123 2004 Nissan Maxima

  1. Begin by diagnosing the issue using a scan tool to confirm the P2123 code and check the accelerator pedal position sensor's readings.
  2. Inspect the wiring and connectors in the sensor circuit for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the accelerator pedal position sensor using a multimeter to ensure it is functioning correctly. Replace the sensor if it is faulty.
  4. Clear the trouble code from the ECM's memory and test drive the vehicle to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P2123 2004 Nissan Maxima

The typical repair costs for addressing a P2123 code on a 2004 Nissan Maxima can range from $150 to $400, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

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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 P2123 2004 Nissan Maxima Code

1. What are the common symptoms of OBDII code P2123 on a 2004 Nissan Maxima?

The common symptoms of OBDII code P2123 on a 2004 Nissan Maxima include issues with acceleration, reduced engine power, and the vehicle going into limp mode.

2. What is the main cause of OBDII code P2123 on a 2004 Nissan Maxima?

The main cause of OBDII code P2123 on a 2004 Nissan Maxima is a malfunction in the accelerator pedal position sensor circuit, which can be due to a faulty sensor, wiring issues, or a poor connection.

3. How can I diagnose the OBDII code P2123 on my 2004 Nissan Maxima?

Diagnosing OBDII code P2123 on a 2004 Nissan Maxima involves using an OBDII scanner to retrieve the code, inspecting the accelerator pedal position sensor and its wiring for any visible damage, and testing the sensor's operation using a multimeter.

4. Can I still drive my 2004 Nissan Maxima with OBDII code P2123?

It is not recommended to drive your 2004 Nissan Maxima with OBDII code P2123, as it can lead to issues with acceleration and engine performance, potentially causing unsafe driving conditions.

5. How can I repair OBDII code P2123 on my 2004 Nissan Maxima?

To repair OBDII code P2123 on a 2004 Nissan Maxima, you may need to replace the accelerator pedal position sensor, repair any damaged wiring, or address any loose connections in the sensor circuit.

6. Is it safe to reset the OBDII code P2123 on my 2004 Nissan Maxima?

While resetting the OBDII code P2123 on a 2004 Nissan Maxima may temporarily turn off the check engine light, it is important to address the underlying issue causing the code to prevent further damage to the vehicle.

7. How much does it cost to fix OBDII code P2123 on a 2004 Nissan Maxima?

The cost to fix OBDII code P2123 on a 2004 Nissan Maxima can vary depending on the specific cause of the issue, but it may involve replacing the accelerator pedal position sensor, which can range from $100 to $300 including parts and labor.

8. Can a DIY enthusiast repair OBDII code P2123 on a 2004 Nissan Maxima?

DIY enthusiasts with the necessary tools and mechanical skills may be able to repair OBDII code P2123 on a 2004 Nissan Maxima by following online guides or service manuals, but it is recommended to have the issue diagnosed by a professional first.

9. Will OBDII code P2123 affect the fuel efficiency of my 2004 Nissan Maxima?

OBDII code P2123 on a 2004 Nissan Maxima can potentially affect fuel efficiency due to issues with acceleration and engine performance, leading to poor fuel consumption.

10. How often does OBDII code P2123 occur in a 2004 Nissan Maxima?

OBDII code P2123 can occur in a 2004 Nissan Maxima due to various factors such as wear and tear on sensor components, electrical issues, or poor maintenance practices, but it is not a common occurrence in well-maintained vehicles.

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