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Engine-Codes – Nissan – P0122 2008 Nissan Maxima

P0122 2008 Nissan Maxima Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Quick Answer

The P0122 diagnostic trouble code (DTC) for a 2008 Nissan Maxima refers to the Throttle Position Sensor/Switch '1' Circuit Low Input. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the TPS connections. 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 Maxima indicates Throttle Position Sensor/Switch '1' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the TPS connections.
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 P0122 2008 Nissan Maxima Description

The P0122 diagnostic trouble code (DTC) for a 2008 Nissan Maxima refers to the Throttle Position Sensor/Switch '1' Circuit Low Input. This code indicates that there is a problem with the throttle position sensor (TPS) or its circuitry, specifically that the input voltage is below the expected range. The TPS is a crucial component of the vehicle's electronic throttle control system, as it informs the engine control module (ECM) about the position of the throttle valve. This information is used to adjust fuel injection, ignition timing, and other parameters to ensure optimal engine performance and efficiency.

OBDII Code P0122 2008 Nissan Maxima - Throttle Position Sensor/Switch '1' Circuit Low Input
P0122 2008 Nissan Maxima Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Common Causes of P0122 2008 Nissan Maxima

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion or contamination in the TPS connections
  4. ECM malfunction or software issues
  5. Mechanical issues with the throttle body or throttle plate

Symptoms of P0122 2008 Nissan Maxima

  1. Poor acceleration and responsiveness
  2. Engine hesitation or surging
  3. Engine stalling or rough idling
  4. Check Engine Light illuminated on the dashboard
  5. Reduced fuel efficiency

How to Fix P0122 2008 Nissan Maxima

  1. Begin by diagnosing the issue using a scan tool to retrieve the trouble codes and monitor the TPS sensor's voltage readings.
  2. Inspect the TPS sensor, wiring, and connectors for any visible damage, corrosion, or contamination. Clean or repair as necessary.
  3. Test the TPS sensor's resistance and voltage output using a multimeter to verify its functionality.
  4. If the TPS sensor is faulty, replace it with a new one following the manufacturer's guidelines. Ensure proper calibration and alignment during installation.
  5. Clear the DTCs from the ECM's memory and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0122 2008 Nissan Maxima

The typical repair costs for addressing a P0122 code on a 2008 Nissan Maxima can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the price of a new throttle position sensor, any necessary wiring repairs, and the labor costs associated with diagnosing and repairing the problem. It's important to note that the actual repair costs can vary based on factors such as the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. It's advisable to consult with a professional mechanic or dealership for a more accurate estimate based on your specific situation.

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 Maxima Code

1. What does OBDII code P0122 indicate on a 2008 Nissan Maxima?

- OBDII code P0122 on a 2008 Nissan Maxima refers to a Throttle Position Sensor/Switch '1' Circuit Low Input error.

2. What are the common symptoms of a P0122 code in a 2008 Nissan Maxima?

- Common symptoms of a P0122 code may include poor acceleration, rough idling, stalling, and decreased fuel efficiency.

3. What are possible causes of a P0122 code in a 2008 Nissan Maxima?

- Possible causes of a P0122 code include a faulty throttle position sensor, damaged wiring or connectors, or issues with the throttle body.

4. How can I diagnose a P0122 code on a 2008 Nissan Maxima?

- To diagnose a P0122 code, you can use an OBDII scanner to read the code and check the throttle position sensor's voltage using a multimeter.

5. How can I repair a P0122 code on a 2008 Nissan Maxima?

- Repairing a P0122 code may involve replacing the throttle position sensor, repairing damaged wiring, or cleaning the throttle body.

6. Can I drive my 2008 Nissan Maxima with a P0122 code?

- It is not recommended to drive your vehicle with a P0122 code as it can lead to poor performance and potential safety hazards.

7. How much does it cost to fix a P0122 code on a 2008 Nissan Maxima?

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

8. Will resetting the OBDII code P0122 on a 2008 Nissan Maxima make it go away?

- Resetting the OBDII code P0122 may temporarily clear the error, but if the underlying issue is not addressed, the code is likely to return.

9. Can a DIY enthusiast repair a P0122 code on a 2008 Nissan Maxima?

- Depending on your experience and tools, you may be able to repair a P0122 code yourself by following online guides or service manuals.

10. How often does a P0122 code occur in a 2008 Nissan Maxima?

- A P0122 code may occur infrequently in a 2008 Nissan Maxima, but it should be addressed promptly to prevent further damage to the vehicle.

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