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P0122 Infiniti Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Quick Answer

The P0122 Infiniti code indicates a problem with the Throttle Position Sensor (TPS) or its circuit, specifically a low input signal. Common causes include Faulty Throttle Position Sensor, Wiring issues in the TPS circuit, Corrosion or damage to TPS connector. 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 Infiniti indicates Throttle Position Sensor/Switch '1' Circuit Low Input.
Common causes
Common causes include Faulty Throttle Position Sensor, Wiring issues in the TPS circuit, Corrosion or damage to TPS connector.
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 08, 2024
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Code P0122 Infiniti Description

The P0122 Infiniti code indicates a problem with the Throttle Position Sensor (TPS) or its circuit, specifically a low input signal. The TPS is a sensor 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 appropriate fuel injection and ignition timing for optimal engine performance.

OBDII Code P0122 Infiniti - Throttle Position Sensor/Switch '1' Circuit Low Input
P0122 Infiniti Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Common Causes of P0122 Infiniti

  1. Faulty Throttle Position Sensor
  2. Wiring issues in the TPS circuit
  3. Corrosion or damage to TPS connector
  4. ECM receiving incorrect signals from the TPS
  5. Environmental factors like moisture or debris affecting TPS performance

Symptoms of P0122 Infiniti

  1. Decreased acceleration and response time
  2. Rough idling or engine stalling
  3. Poor fuel efficiency
  4. Check Engine Light illuminated on the dashboard

How to Fix P0122 Infiniti

  1. Begin by diagnosing the issue using a diagnostic scanner to confirm the P0122 code.
  2. Inspect the TPS and its wiring for any visible damage or corrosion.
  3. Test the TPS using a multimeter to check for proper voltage output.
  4. Replace the TPS if it is found to be faulty, ensuring proper installation and calibration.
  5. Clear the error code and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P0122 Infiniti

The cost of repairing a P0122 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, replacing a Throttle Position Sensor can cost between $100 and $200 for the part alone. Labor costs can range from $100 to $200, bringing the total repair cost to approximately $200 to $400. However, it is recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your vehicle make and model. Labor rates typically range from $80 to $150 per hour, but can be higher in certain areas or at dealerships.

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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Information for Specific Infiniti Models

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 Infiniti Code

1. What are the common symptoms of OBDII code P0122 in an Infiniti?

The common symptoms of OBDII code P0122 in an Infiniti include a decrease in engine performance, rough idling, stalling, and issues with acceleration.

2. What are the possible causes of the Throttle Position Sensor/Switch '1' Circuit Low Input code in an Infiniti?

The possible causes of OBDII code P0122 in an Infiniti include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

3. How can I diagnose the cause of OBDII code P0122 in my Infiniti?

To diagnose the cause of OBDII code P0122 in your Infiniti, you can use a scan tool to check for the specific trouble code, inspect the throttle position sensor and its wiring for any visible damage, and test the sensor's voltage output.

4. Can a dirty throttle body cause OBDII code P0122 in an Infiniti?

Yes, a dirty throttle body can sometimes cause OBDII code P0122 in an Infiniti by affecting the proper functioning of the throttle position sensor. It is recommended to clean the throttle body as part of the troubleshooting process.

5. How do I repair OBDII code P0122 in my Infiniti?

To repair OBDII code P0122 in your Infiniti, you may need to replace the throttle position sensor if it is found to be faulty, repair any damaged wiring or connectors, and reset the trouble code using a scan tool after completing the repairs.

6. Is it safe to drive my Infiniti with OBDII code P0122?

It is not recommended to drive your Infiniti with OBDII code P0122, as it can lead to performance issues and potential safety concerns. It is best to address the underlying cause of the trouble code before driving the vehicle again.

7. Can I reset OBDII code P0122 in my Infiniti without fixing the issue?

While you can reset OBDII code P0122 in your Infiniti using a scan tool, it is important to address the underlying issue causing the trouble code. Ignoring the problem may lead to further damage and potential safety risks.

8. How much does it typically cost to repair OBDII code P0122 in an Infiniti?

The cost to repair OBDII code P0122 in an Infiniti can vary depending on the specific cause of the issue. Costs may include the price of a new throttle position sensor, labor costs for repairs, and any additional parts or components that need replacement.

9. Can a DIY enthusiast fix OBDII code P0122 in an Infiniti?

Depending on your level of mechanical expertise, a DIY enthusiast may be able to fix OBDII code P0122 in an Infiniti by following repair guides, watching tutorials, and using the necessary tools. However, it is recommended to consult a professional if unsure.

10. How often does OBDII code P0122 occur in Infiniti vehicles?

OBDII code P0122 related to the throttle position sensor/switch '1' circuit low input can occur in Infiniti vehicles due to various factors, including sensor wear, electrical issues, or ECM malfunctions. Proper maintenance and timely repairs can help prevent this code from appearing frequently.

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