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Engine-Codes – Nissan – P0122 2008 Nissan Altima Sedan

P0122 2008 Nissan Altima Sedan Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The P0122 code for a 2008 Nissan Altima Sedan indicates a potential issue with the Throttle Position Sensor/Switch 'A' Circuit registering a low input. Common causes include Faulty throttle position sensor, Damaged or corroded wiring/connectors in the TPS 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
P0122 2008 Nissan Altima Sedan indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged or corroded wiring/connectors in the TPS 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 09, 2024
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Code P0122 2008 Nissan Altima Sedan Description

The P0122 code for a 2008 Nissan Altima Sedan indicates a potential issue with the Throttle Position Sensor/Switch 'A' Circuit registering a low input. The throttle position sensor (TPS) is a crucial component that monitors the position of the throttle valve and sends this information to the engine control module (ECM). The ECM uses this data to determine the fuel injection and ignition timing for optimal engine performance.

OBDII Code P0122 2008 Nissan Altima Sedan - Throttle Position Sensor/Switch 'A' Circuit Low Input
P0122 2008 Nissan Altima Sedan Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Common Causes of P0122 2008 Nissan Altima Sedan

  1. Faulty throttle position sensor
  2. Damaged or corroded wiring/connectors in the TPS circuit
  3. Issues with the ECM
  4. Throttle body malfunction
  5. Incorrect TPS calibration

Symptoms of P0122 2008 Nissan Altima Sedan

  1. Reduced engine power or acceleration
  2. Poor fuel efficiency
  3. Rough idling or stalling
  4. Check Engine Light illuminated on the dashboard

How to Fix P0122 2008 Nissan Altima Sedan

  1. Begin by diagnosing the TPS using a multimeter to check for proper voltage output.
  2. Inspect the wiring and connectors in the TPS circuit for any damage or corrosion.
  3. Replace the throttle position sensor if it is found to be faulty.
  4. Clear the diagnostic trouble codes from the ECM and reset the system.
  5. Test drive the vehicle to ensure the issue has been resolved and the code does not reappear.

Cost to Fix P0122 2008 Nissan Altima Sedan

The cost of repairing a Throttle Position Sensor/Switch 'A' Circuit Low Input issue can vary depending on the specific cause of the problem and the labor rates in your area. Generally, replacing a faulty TPS on a 2008 Nissan Altima Sedan can cost between $100 to $200 for the part itself. Labor costs typically range from $100 to $200, with total repair costs potentially falling between $200 to $400. It's advisable to contact local auto repair shops for accurate pricing based on your location and vehicle specifications.

When is the Code Detected?

An excessively low voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM).

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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 P0122 2008 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0122 (Throttle Position Sensor/Switch 'A' Circuit Low Input) in a 2008 Nissan Altima Sedan?

- Common symptoms include poor acceleration, stalling, rough idling, and possible difficulty shifting gears.

2. What are the possible causes of OBDII code P0122 in a 2008 Nissan Altima Sedan?

- The code P0122 is typically triggered by a faulty throttle position sensor, damaged wiring or connectors, or a problem with the engine control module (ECM).

3. How can I diagnose the cause of OBDII code P0122 in my 2008 Nissan Altima Sedan?

- You can use a multimeter to test the throttle position sensor's voltage output, check the wiring for any damage or loose connections, and scan the ECM for any related error codes.

4. Can I still drive my 2008 Nissan Altima Sedan with OBDII code P0122 active?

- It is not recommended to drive the vehicle with an active P0122 code, as it can lead to further damage and potentially unsafe driving conditions.

5. How can I repair OBDII code P0122 in my 2008 Nissan Altima Sedan?

- Repair options include replacing the throttle position sensor, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.

6. Is it possible to reset OBDII code P0122 in a 2008 Nissan Altima Sedan without repairing the issue?

- While you can clear the code with an OBDII scanner, it is important to address the underlying problem causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code P0122 in a 2008 Nissan Altima Sedan?

- The cost of repairing P0122 can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Are there any preventive measures to avoid OBDII code P0122 in a 2008 Nissan Altima Sedan?

- Regular maintenance, such as keeping the throttle body clean, inspecting wiring for damage, and addressing any engine performance issues promptly, can help prevent the occurrence of P0122.

9. Will OBDII code P0122 cause my 2008 Nissan Altima Sedan to fail an emissions test?

- Yes, an active P0122 code can cause your vehicle to fail an emissions test due to its impact on engine performance and emissions control systems.

10. How long does it typically take to repair OBDII code P0122 in a 2008 Nissan Altima Sedan?

- The repair time for P0122 can vary depending on the exact cause of the issue and the availability of parts, but it may take a few hours to a full day to complete the repair.

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