AutoCodes – Nissan – P2123 2011 Nissan Altima Sedan

P2123 2011 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 2011 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.

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Code Popularity 1,780

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 P2123 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 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 2011 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit Range/Performance - AutoCodes.com — P2123 2011 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2123 2011 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 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 P2123 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.

Need more information about the P2123 2011 Nissan Altima Sedan 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 P2123 2011 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2123 in a 2011 Nissan Altima Sedan?

The common symptoms of OBDII code P2123 in a 2011 Nissan Altima Sedan include issues with acceleration, reduced engine power, and the vehicle going into a reduced power mode.

2. What does the OBDII code P2123 mean for a 2011 Nissan Altima Sedan?

OBDII code P2123 for a 2011 Nissan Altima Sedan indicates a problem with the accelerator pedal position sensor circuit, specifically relating to range/performance issues.

3. What are the possible causes of OBDII code P2123 in a 2011 Nissan Altima Sedan?

Possible causes of OBDII code P2123 in a 2011 Nissan Altima Sedan include a faulty accelerator pedal position sensor, wiring or connector issues in the sensor circuit, or a problem with the engine control module.

4. How can I diagnose the OBDII code P2123 in my 2011 Nissan Altima Sedan?

Diagnosing OBDII code P2123 in a 2011 Nissan Altima Sedan involves checking the accelerator pedal position sensor for proper operation, inspecting the sensor circuit wiring and connectors for damage, and scanning the vehicle's computer for related fault codes.

5. Can I still drive my 2011 Nissan Altima Sedan with OBDII code P2123?

It is not recommended to drive your 2011 Nissan Altima Sedan with OBDII code P2123, as it can lead to issues with acceleration and engine power. It is advisable to have the vehicle inspected and repaired as soon as possible.

6. How serious is OBDII code P2123 in a 2011 Nissan Altima Sedan?

OBDII code P2123 in a 2011 Nissan Altima Sedan is a serious issue as it can affect the vehicle's drivability and performance. Ignoring this code may lead to further damage to the vehicle.

7. What are some repair tips for fixing OBDII code P2123 in a 2011 Nissan Altima Sedan?

Repair tips for fixing OBDII code P2123 in a 2011 Nissan Altima Sedan include checking the sensor circuit connections, replacing the accelerator pedal position sensor if faulty, and clearing the fault code from the vehicle's computer.

8. How much does it typically cost to repair OBDII code P2123 in a 2011 Nissan Altima Sedan?

The cost to repair OBDII code P2123 in a 2011 Nissan Altima Sedan can vary depending on the specific issue causing the code. Repair costs may include parts and labor for sensor replacement or wiring repairs.

9. Can resetting the OBDII code P2123 in a 2011 Nissan Altima Sedan temporarily fix the issue?

Resetting the OBDII code P2123 in a 2011 Nissan Altima Sedan may temporarily clear the fault code, but if the underlying issue is not addressed, the code is likely to return. It is important to diagnose and repair the root cause of the code.

10. Is it possible to prevent OBDII code P2123 from appearing in a 2011 Nissan Altima Sedan?

Regular maintenance, such as checking and cleaning sensor connections, can help prevent OBDII code P2123 from appearing in a 2011 Nissan Altima Sedan. Additionally, addressing any acceleration or performance issues promptly can help avoid triggering this fault code.