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Engine-Codes – Nissan – P2122 2008 Nissan Altima Sedan

P2122 2008 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Quick Answer

The P2122 diagnostic trouble code (DTC) for a 2008 Nissan Altima Sedan refers to the Accelerator Pedal Position Sensor Circuit Range/Performance issue. Common causes include Faulty accelerator pedal position sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the ECM. 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
P2122 2008 Nissan Altima Sedan indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty accelerator pedal position sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the ECM.
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 11, 2024
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Code P2122 2008 Nissan Altima Sedan Description

The P2122 diagnostic trouble code (DTC) for a 2008 Nissan Altima Sedan refers to the Accelerator Pedal Position Sensor Circuit Range/Performance issue. This code is triggered when the Engine Control Module (ECM) detects that the signal from the accelerator pedal position sensor does not match the expected range. The accelerator pedal position sensor is a crucial component that communicates the position of the accelerator pedal to the ECM, allowing the engine to adjust the fuel delivery and ignition timing accordingly.

OBDII Code P2122 2008 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit Range/Performance
P2122 2008 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Common Causes of P2122 2008 Nissan Altima Sedan

  1. Faulty accelerator pedal position sensor
  2. Damaged or corroded wiring/connectors in the sensor circuit
  3. Issues with the ECM
  4. Poor electrical connections
  5. Water or debris intrusion affecting sensor operation

Symptoms of P2122 2008 Nissan Altima Sedan

  1. Reduced engine power and acceleration
  2. Rough idling or engine misfires
  3. Hesitation or jerking during acceleration
  4. Stalling or difficulty starting the engine
  5. Illumination of the Check Engine Light

How to Fix P2122 2008 Nissan Altima Sedan

  1. Begin by conducting a comprehensive diagnosis using a scan tool to confirm the presence of the P2122 code and identify the specific cause of the issue.
  2. Inspect the accelerator pedal position sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components as needed.
  3. Test the sensor's output voltage and resistance to ensure it is within the manufacturer's specifications.
  4. Clear the DTC and reset the ECM to see if the code returns. If it does not, perform a road test to confirm 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 P2122 2008 Nissan Altima Sedan

The typical repair costs for addressing a P2122 code on a 2008 Nissan Altima Sedan can vary depending on the specific cause of the issue and the labor rates in your area. As a rough estimate, the cost for parts and labor to replace a faulty accelerator pedal position sensor and address related wiring issues can range from $200 to $500. However, it's essential to keep in mind that additional diagnostic time and potential ECM repairs may increase the overall cost. It's recommended to consult with a qualified mechanic or auto repair shop to get a more accurate estimate based on your vehicle's specific needs. Labor rates at auto repair shops typically range between $80 and $150 per hour, but rates can vary based on location and other factors.

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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 P2122 2008 Nissan Altima Sedan Code

1. What does OBDII code P2122 mean for my 2008 Nissan Altima Sedan?

- OBDII code P2122 indicates an issue with the accelerator pedal position sensor circuit range/performance.

2. What are the common symptoms of OBDII code P2122 in a 2008 Nissan Altima Sedan?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and illuminated Check Engine Light.

3. What are some possible causes of OBDII code P2122 in a 2008 Nissan Altima Sedan?

- Possible causes include a faulty accelerator pedal position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

4. How can I diagnose the cause of OBDII code P2122 in my 2008 Nissan Altima Sedan?

- Diagnosing the issue may involve checking the sensor's wiring and connectors for damage, testing the sensor's voltage output, and scanning the vehicle's computer for related codes.

5. Can I drive my 2008 Nissan Altima Sedan with OBDII code P2122?

- It is not recommended to drive the vehicle with OBDII code P2122 as it can lead to performance issues and potential safety concerns.

6. How can I repair OBDII code P2122 in my 2008 Nissan Altima Sedan?

- Repairing code P2122 may involve replacing the accelerator pedal position sensor, repairing damaged wiring or connectors, or reprogramming the engine control module.

7. Is it possible to reset OBDII code P2122 in a 2008 Nissan Altima Sedan?

- Resetting the code without addressing the underlying issue will likely result in the Check Engine Light returning. It's best to diagnose and repair the problem first.

8. Are there any DIY tips for troubleshooting OBDII code P2122 in a 2008 Nissan Altima Sedan?

- DIY tips include visually inspecting the sensor and its connections for visible damage, checking for loose or corroded connectors, and using a multimeter to test sensor voltage.

9. How much does it typically cost to repair OBDII code P2122 in a 2008 Nissan Altima Sedan?

- The cost of repairing code P2122 can vary depending on the cause of the issue and whether you choose to do the repairs yourself or take it to a mechanic. Costs may range from $100 to $500 or more.

10. Can OBDII code P2122 in a 2008 Nissan Altima Sedan cause long-term damage if left unrepaired?

- Ignoring OBDII code P2122 can lead to further damage to the engine or other components over time, so it's important to address the issue promptly.

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