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Engine-Codes – Nissan – P0122 2012 Nissan Altima Sedan

P0122 2012 Nissan Altima Sedan Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The P0122 code for a 2012 Nissan Altima Sedan indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically a low input signal. Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Malfunctioning 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 2012 Nissan Altima Sedan indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes
Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Malfunctioning 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 12, 2024
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Code P0122 2012 Nissan Altima Sedan Description

The P0122 code for a 2012 Nissan Altima Sedan indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically a low input signal. The throttle position sensor (TPS) is a crucial component of the vehicle's electronic control system, as it 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 air-fuel mixture for combustion, ignition timing, and other engine functions.

OBDII Code P0122 2012 Nissan Altima Sedan - Throttle Position Sensor/Switch 'A' Circuit Low Input
P0122 2012 Nissan Altima Sedan Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Common Causes of P0122 2012 Nissan Altima Sedan

  1. Faulty Throttle Position Sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Malfunctioning ECM
  4. Mechanical issue with the throttle body
  5. Corrosion or contamination in the TPS circuit

Symptoms of P0122 2012 Nissan Altima Sedan

  1. Poor acceleration and throttle response
  2. Rough idling or stalling
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated
  5. Limp mode activation

How to Fix P0122 2012 Nissan Altima Sedan

  1. Begin by diagnosing the issue using a scan tool to confirm the P0122 code and pinpoint the exact cause.
  2. Inspect the Throttle Position Sensor and its wiring for any visible damage or corrosion. Replace the TPS if necessary.
  3. Check the wiring and connectors in the TPS circuit for any faults or loose connections. Repair or replace as needed.
  4. Test the ECM to ensure it is functioning correctly and communicating with the TPS properly. Replace the ECM if it is faulty.
  5. Clear the code from the ECM memory and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0122 2012 Nissan Altima Sedan

The typical repair costs for addressing a P0122 code on a 2012 Nissan Altima Sedan can vary depending on the specific cause of the issue. In general, replacing a faulty Throttle Position Sensor can cost between $50 to $200, while diagnosing and repairing wiring or connector issues may range from $100 to $300. If the ECM needs to be replaced, the cost can be higher, potentially ranging from $300 to $800. Labor costs at auto repair shops typically range from $80 to $150 per hour, but rates can vary based on location and the shop's expertise. It's recommended to obtain a detailed estimate from a qualified mechanic to determine the exact cost for resolving the P0122 code.

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 2012 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0122 in a 2012 Nissan Altima Sedan?

The common symptoms of OBDII code P0122 in a 2012 Nissan Altima Sedan include issues like poor acceleration, stalling, rough idling, and potential difficulty shifting gears.

2. What does the OBDII code P0122 for a 2012 Nissan Altima Sedan indicate?

OBDII code P0122 for a 2012 Nissan Altima Sedan indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically detecting a low input signal.

3. What are the possible causes of OBDII code P0122 in a 2012 Nissan Altima Sedan?

Possible causes of OBDII code P0122 in a 2012 Nissan Altima Sedan include a faulty throttle position sensor, damaged wiring or connectors, a corroded sensor terminal, or issues with the engine control module.

4. How can I diagnose the Throttle Position Sensor/Switch 'A' Circuit low input issue in a 2012 Nissan Altima Sedan?

To diagnose the Throttle Position Sensor/Switch 'A' Circuit low input issue in a 2012 Nissan Altima Sedan, you can use an OBDII scanner to retrieve the specific fault code, visually inspect the sensor and wiring for any visible damage, and perform voltage tests on the sensor.

5. Is it safe to continue driving a 2012 Nissan Altima Sedan with OBDII code P0122?

It is not recommended to continue driving a 2012 Nissan Altima Sedan with OBDII code P0122 as it can lead to poor engine performance, potential stalling, and other safety hazards.

6. Can I reset the OBDII code P0122 in a 2012 Nissan Altima Sedan by disconnecting the battery?

While disconnecting the battery may temporarily clear the code, it is not a permanent solution. It is recommended to diagnose and repair the underlying issue causing the P0122 code.

7. How much does it typically cost to repair OBDII code P0122 in a 2012 Nissan Altima Sedan?

The cost of repairing OBDII code P0122 in a 2012 Nissan Altima Sedan can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can a DIY enthusiast fix the Throttle Position Sensor/Switch 'A' Circuit low input issue in a 2012 Nissan Altima Sedan?

DIY enthusiasts with mechanical knowledge and the right tools can potentially fix the Throttle Position Sensor/Switch 'A' Circuit low input issue in a 2012 Nissan Altima Sedan. However, it is recommended to proceed with caution and research the specific repair procedures thoroughly.

9. Will replacing the throttle position sensor resolve the OBDII code P0122 in a 2012 Nissan Altima Sedan?

Replacing the throttle position sensor is a common fix for OBDII code P0122 in a 2012 Nissan Altima Sedan, especially if the sensor is faulty or sending a low input signal. However, it is essential to verify the diagnosis before proceeding with the replacement.

10. How long does it take to repair OBDII code P0122 in a 2012 Nissan Altima Sedan?

The repair time for OBDII code P0122 in a 2012 Nissan Altima Sedan can vary depending on the complexity of the issue and the repair process involved. On average, it may take a few hours to a day for a professional mechanic to diagnose and fix the problem.

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