AutoCodes – Nissan – P2123 2005 Nissan Altima Sedan

P2123 2005 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

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 Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position 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: P2123 2005 Nissan Altima Sedan indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes: Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,725

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2123 2005 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 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 P2123 2005 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit Range/Performance - AutoCodes.com — P2123 2005 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2123 2005 Nissan Altima Sedan?

Faulty Accelerator Pedal Position Sensor
Accelerator Pedal Position Sensor harness is open or shorted
Accelerator Pedal Position Sensor circuit poor electrical connection

How to Fix the DTC P2123 2005 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 P2123 2005 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 P2123 2005 Nissan Altima Sedan code?

Need more information on how to fix the P2123 2005 Nissan Altima Sedan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2123 2005 Nissan Altima Sedan code diagnosed by a professional: Find a repair shop in your area

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 2005 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2123 in a 2005 Nissan Altima Sedan?

The common symptoms of OBDII code P2123 include issues with the accelerator pedal response, reduced engine power, and potential stalling or hesitation during acceleration.

2. What causes the OBDII code P2123 in a 2005 Nissan Altima Sedan?

The most common cause of OBDII code P2123 in a 2005 Nissan Altima Sedan is a malfunctioning accelerator pedal position sensor or a problem within the sensor circuit itself.

3. How serious is OBDII code P2123 in a 2005 Nissan Altima Sedan?

OBDII code P2123 should be taken seriously as it can affect the vehicle's drivability and performance. It is recommended to address this issue promptly to prevent further damage or safety risks.

4. Can I continue to drive my 2005 Nissan Altima Sedan with OBDII code P2123?

It is not recommended to continue driving your vehicle with OBDII code P2123, as it can lead to further damage and potentially unsafe driving conditions. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose OBDII code P2123 in my 2005 Nissan Altima Sedan?

Diagnosing OBDII code P2123 involves using a diagnostic scanner to retrieve the trouble code, inspecting the accelerator pedal position sensor and its circuit for any visible damage or loose connections, and performing a thorough inspection of the related components.

6. What are some repair tips for fixing OBDII code P2123 in a 2005 Nissan Altima Sedan?

Some repair tips for fixing OBDII code P2123 include checking and cleaning the accelerator pedal position sensor, ensuring proper wiring connections, and replacing the sensor if necessary. It is also recommended to clear the trouble code after repairs are made.

7. How much does it cost to repair OBDII code P2123 in a 2005 Nissan Altima Sedan?

The cost of repairing OBDII code P2123 in a 2005 Nissan Altima Sedan can vary depending on the extent of the issue and the labor rates in your area. It is recommended to obtain quotes from local mechanics or dealerships for a more accurate estimate.

8. Can a DIY enthusiast fix OBDII code P2123 in a 2005 Nissan Altima Sedan?

While some DIY enthusiasts may be able to diagnose and repair OBDII code P2123 in a 2005 Nissan Altima Sedan, it is recommended to have the issue addressed by a qualified mechanic or technician to ensure proper diagnosis and repair.

9. Will OBDII code P2123 cause my 2005 Nissan Altima Sedan to fail an emissions test?

OBDII code P2123 can potentially cause your 2005 Nissan Altima Sedan to fail an emissions test, as it indicates a problem with the accelerator pedal position sensor circuit, which can affect the vehicle's emissions control system.

10. How can I prevent OBDII code P2123 from appearing in my 2005 Nissan Altima Sedan?

To prevent OBDII code P2123 from appearing in your 2005 Nissan Altima Sedan, it is important to regularly maintain and inspect the accelerator pedal position sensor, as well as other related components, to ensure they are functioning properly.