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P2123 2003 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Quick Answer

The P2123 diagnostic trouble code (DTC) for a 2003 Nissan Altima Sedan refers to the Accelerator Pedal Position Sensor Circuit Range/Performance. Common causes include Faulty accelerator pedal position sensor, Damaged wiring or connectors in the accelerator pedal position sensor circuit, Corrosion or contamination in the sensor or 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 2003 Nissan Altima Sedan indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty accelerator pedal position sensor, Damaged wiring or connectors in the accelerator pedal position sensor circuit, Corrosion or contamination in the sensor or 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 13, 2024
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Code P2123 2003 Nissan Altima Sedan Description

The P2123 diagnostic trouble code (DTC) for a 2003 Nissan Altima Sedan refers to the Accelerator Pedal Position Sensor Circuit Range/Performance. This code indicates that there is a problem with the accelerator pedal position sensor circuit, specifically related to its range or performance. The accelerator pedal position sensor is a crucial component of the vehicle's electronic throttle control system, which regulates the engine's throttle opening based on the driver's input through the accelerator pedal.

OBDII Code P2123 2003 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit Range/Performance
P2123 2003 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Common Causes of P2123 2003 Nissan Altima Sedan

  1. Faulty accelerator pedal position sensor
  2. Damaged wiring or connectors in the accelerator pedal position sensor circuit
  3. Corrosion or contamination in the sensor or circuit
  4. Issues with the ECM or electronic throttle control system
  5. Mechanical issues affecting the accelerator pedal or throttle body

Symptoms of P2123 2003 Nissan Altima Sedan

  1. Check engine light illuminated on the dashboard
  2. Reduced engine power or lack of response to accelerator pedal input
  3. Rough idling or engine stalling
  4. Poor acceleration or hesitation when accelerating
  5. Increased fuel consumption

How to Fix P2123 2003 Nissan Altima Sedan

  1. Begin by conducting a thorough inspection of the accelerator pedal position sensor, wiring, and connectors to identify any visible damage or corrosion.
  2. Use a multimeter to test the sensor's resistance and voltage output to determine if it is functioning within the manufacturer's specified range.
  3. If the sensor is faulty, replace it with a new one following the manufacturer's guidelines for installation.
  4. Check and repair any damaged wiring or connectors in the sensor circuit.
  5. Clear the DTC and reset the ECM to ensure the code does not reappear after the repair.

Cost to Fix P2123 2003 Nissan Altima Sedan

The typical repair costs for addressing the P2123 code on a 2003 Nissan Altima Sedan can vary depending on the specific cause of the issue and the parts and labor required for the repair. In general, replacing a faulty accelerator pedal position sensor can cost between $100 and $200, while addressing wiring or connector issues may add to the total repair cost. Labor rates at auto repair shops typically range from $80 to $150 per hour, so the total cost of the repair can vary based on the shop's rates and the time required for diagnosis and repair. It is advisable to obtain a detailed estimate from a qualified mechanic or repair shop to determine the precise cost of addressing the P2123 code on your vehicle.

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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 2003 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2123 in a 2003 Nissan Altima Sedan?

Symptoms may include poor acceleration, lack of power, engine stalling, and the vehicle going into limp mode.

2. What does the OBDII code P2123 indicate in a 2003 Nissan Altima Sedan?

Code P2123 indicates an issue with the accelerator pedal position sensor circuit range or performance.

3. What are the possible causes of OBDII code P2123 in a 2003 Nissan Altima Sedan?

Possible causes include a faulty accelerator pedal position sensor, damaged wiring or connectors in the sensor circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the cause of OBDII code P2123 in my 2003 Nissan Altima Sedan?

Diagnosis typically involves checking the accelerator pedal position sensor for proper operation, inspecting the sensor wiring and connectors for damage, and testing the ECM for any faults.

5. Can I drive my 2003 Nissan Altima Sedan with OBDII code P2123?

It is not recommended to drive the vehicle with code P2123 as it may lead to poor performance and potential safety issues. It's best to address the problem promptly.

6. How can I repair OBDII code P2123 in my 2003 Nissan Altima Sedan?

Repair methods may include replacing the accelerator pedal position sensor, repairing damaged wiring or connectors, or reprogramming the ECM.

7. Are there any DIY tips for fixing OBDII code P2123 in a 2003 Nissan Altima Sedan?

DIY tips include carefully inspecting the sensor wiring for any visible damage, ensuring proper connections, and consulting the vehicle's service manual for specific repair procedures.

8. How much does it typically cost to repair OBDII code P2123 in a 2003 Nissan Altima Sedan?

The cost of repair can vary depending on the specific cause of the issue. Replacement of the accelerator pedal position sensor or ECM repair can range from $100 to $500 or more.

9. Will resetting the OBDII code P2123 in my 2003 Nissan Altima Sedan make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem.

10. Can a faulty accelerator pedal position sensor cause other OBDII codes to trigger in a 2003 Nissan Altima Sedan?

Yes, a faulty accelerator pedal position sensor can cause related codes to trigger, such as P2122 (Accelerator Pedal Position Sensor 1 Circuit Low) or P2121 (Accelerator Pedal Position Sensor 1 Performance).

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