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Engine-Codes – Nissan – P0122 2004 Nissan Sentra

P0122 2004 Nissan Sentra Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Quick Answer

The P0122 code for a 2004 Nissan Sentra indicates a problem with the Throttle Position Sensor/Switch '1' Circuit, specifically a low input. Common causes include A faulty throttle position sensor (TPS), Damaged or frayed wiring/connectors in the TPS circuit, Corrosion or dirt buildup on the TPS sensor. 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 2004 Nissan Sentra indicates Throttle Position Sensor/Switch '1' Circuit Low Input.
Common causes
Common causes include A faulty throttle position sensor (TPS), Damaged or frayed wiring/connectors in the TPS circuit, Corrosion or dirt buildup on the TPS sensor.
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 2004 Nissan Sentra Description

The P0122 code for a 2004 Nissan Sentra indicates a problem with the Throttle Position Sensor/Switch '1' Circuit, specifically 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 amount of air entering the engine and adjusts the fuel injection and ignition timing accordingly. A low input from the TPS can disrupt this process, leading to drivability issues and potentially affecting the vehicle's overall performance.

OBDII Code P0122 2004 Nissan Sentra - Throttle Position Sensor/Switch '1' Circuit Low Input
P0122 2004 Nissan Sentra Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Common Causes of P0122 2004 Nissan Sentra

  1. A faulty throttle position sensor (TPS).
  2. Damaged or frayed wiring/connectors in the TPS circuit.
  3. Corrosion or dirt buildup on the TPS sensor.
  4. Issues with the engine control module (ECM).
  5. Electrical problems such as a short circuit in the TPS circuit.

Symptoms of P0122 2004 Nissan Sentra

  1. Poor acceleration or lack of response when pressing the gas pedal.
  2. Rough idling or stalling when coming to a stop.
  3. Decreased fuel efficiency and potentially increased emissions.
  4. Difficulty shifting gears in automatic transmission vehicles.
  5. Check engine light illuminated on the dashboard.

How to Fix P0122 2004 Nissan Sentra

  1. Begin by scanning the vehicle's ECM with a diagnostic scanner to confirm the P0122 code.
  2. Inspect the throttle position sensor and its wiring/connectors for any visible damage or corrosion.
  3. Test the TPS sensor using a multimeter to check for proper voltage signals.
  4. Replace the throttle position sensor if it is found to be faulty, ensuring proper installation and calibration.
  5. Clear the fault code from the ECM memory and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0122 2004 Nissan Sentra

The cost of repairing a P0122 code on a 2004 Nissan Sentra can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the price of a new throttle position sensor can range from $50 to $150, while labor costs can add an additional $100 to $200, resulting in a total repair cost of $150 to $350. Keep in mind that these estimates are approximate, and actual costs may differ based on factors such as location, shop rates, and any additional parts or services needed during the repair process. It is advisable to consult with a trusted mechanic or repair shop for a more accurate cost 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 2004 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0122 on a 2004 Nissan Sentra?

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

2. What does the OBDII code P0122 on a 2004 Nissan Sentra indicate?

- The code indicates an issue with the Throttle Position Sensor/Switch '1' Circuit, specifically a low input signal.

3. What are the possible causes of OBDII code P0122 on a 2004 Nissan Sentra?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, a malfunctioning PCM, or a problem with the throttle body.

4. How can I diagnose the cause of OBDII code P0122 on my 2004 Nissan Sentra?

- You can diagnose the issue by checking the throttle position sensor's wiring and connectors, testing the sensor's voltage output, and scanning the system for any related codes.

5. Can I drive my 2004 Nissan Sentra with OBDII code P0122?

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

6. How can I repair OBDII code P0122 on my 2004 Nissan Sentra?

- Repair options include replacing the throttle position sensor, repairing any damaged wiring or connectors, or resetting the PCM to see if the code returns.

7. Is it safe to reset the PCM to clear OBDII code P0122 on a 2004 Nissan Sentra?

- While resetting the PCM may temporarily clear the code, it is important to diagnose and address the root cause of the issue to prevent it from recurring.

8. Can a DIY enthusiast fix OBDII code P0122 on a 2004 Nissan Sentra?

- Depending on your mechanical skills and access to tools, you may be able to replace the throttle position sensor or check the wiring yourself. However, complex diagnostics may require professional help.

9. How much does it cost to repair OBDII code P0122 on a 2004 Nissan Sentra?

- The cost of repair can vary depending on the cause of the issue, but it typically ranges from $100 to $300 for parts and labor.

10. Will OBDII code P0122 on a 2004 Nissan Sentra affect fuel efficiency?

- Yes, this code can impact fuel efficiency as it can lead to improper fuel delivery and combustion, affecting the overall performance of the vehicle.

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