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P0122 2002 Nissan Altima Sedan Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Quick Answer

The P0122 diagnostic trouble code (DTC) for a 2002 Nissan Altima Sedan indicates a problem with the Throttle Position Sensor/Switch '1' Circuit, specifically a low input signal. Common causes include Faulty throttle position sensor, Wiring or connector issues in the TPS circuit, Corrosion or contamination in 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 2002 Nissan Altima Sedan indicates Throttle Position Sensor/Switch '1' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Wiring or connector issues in the TPS circuit, Corrosion or contamination in 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 15, 2024
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Code P0122 2002 Nissan Altima Sedan Description

The P0122 diagnostic trouble code (DTC) for a 2002 Nissan Altima Sedan indicates a problem with the Throttle Position Sensor/Switch '1' Circuit, specifically a low input signal. The throttle position sensor (TPS) is a crucial component of the vehicle's electronic fuel injection system, as it monitors the position of the throttle valve and sends signals to the engine control unit (ECU) to adjust fuel delivery and ignition timing accordingly. A low input signal from the TPS can lead to various performance issues, affecting the engine's responsiveness, fuel efficiency, and overall drivability.

OBDII Code P0122 2002 Nissan Altima Sedan - Throttle Position Sensor/Switch '1' Circuit Low Input
P0122 2002 Nissan Altima Sedan Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Common Causes of P0122 2002 Nissan Altima Sedan

  1. Faulty throttle position sensor
  2. Wiring or connector issues in the TPS circuit
  3. Corrosion or contamination in the TPS sensor
  4. ECU malfunction affecting TPS signal
  5. Mechanical issues affecting throttle valve movement

Symptoms of P0122 2002 Nissan Altima Sedan

  1. Check Engine Light illuminated
  2. Poor acceleration and throttle response
  3. Rough idling or stalling
  4. Hesitation or jerking during acceleration
  5. Reduced fuel efficiency

How to Fix P0122 2002 Nissan Altima Sedan

  1. Begin by diagnosing the TPS using a scan tool to confirm the P0122 code and check for any other related codes.
  2. Inspect the TPS wiring and connectors for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the TPS sensor's voltage output using a multimeter to ensure it is within the manufacturer's specified range.
  4. If the TPS sensor is faulty, replace it with a new one following the manufacturer's guidelines.
  5. Clear the DTC codes, reset the ECU, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0122 2002 Nissan Altima Sedan

The cost of repairing a Throttle Position Sensor/Switch '1' Circuit Low Input issue on a 2002 Nissan Altima Sedan can vary depending on the specific cause of the problem and the cost of parts and labor in your area. On average, replacing a faulty TPS sensor can range from $50 to $200, while labor costs can add another $50 to $150. Overall, you can expect to pay anywhere from $100 to $350 for parts and labor to address this issue. Keep in mind that prices may vary based on location, the complexity of the repair, and whether you choose to have the repair done at a dealership, independent shop, or perform it yourself. It's recommended to obtain quotes from local auto repair shops for a more accurate estimate.

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 2002 Nissan Altima Sedan Code

1. What does the OBDII code P0122 on a 2002 Nissan Altima Sedan indicate?

The code P0122 indicates a Throttle Position Sensor/Switch '1' Circuit Low Input error on a 2002 Nissan Altima Sedan.

2. What are the common symptoms of a P0122 code on a 2002 Nissan Altima Sedan?

Common symptoms of a P0122 code include rough idling, poor acceleration, stalling, and potential issues with shifting gears.

3. What are the possible causes of a P0122 code on a 2002 Nissan Altima Sedan?

Possible causes of a P0122 code include a faulty throttle position sensor, damaged wiring or connectors in the throttle position sensor circuit, or a problem with the engine control module.

4. How can I diagnose a P0122 code on my 2002 Nissan Altima Sedan?

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. Inspect the sensor and its wiring for any visible damage.

5. Can I drive my 2002 Nissan Altima Sedan 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 issues. It's best to address the problem promptly.

6. How can I repair a P0122 code on my 2002 Nissan Altima Sedan?

Repairing a P0122 code may involve replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the engine control module.

7. Are there any DIY tips for fixing a P0122 code on a 2002 Nissan Altima Sedan?

If you're comfortable with automotive repairs, you may be able to replace the throttle position sensor yourself. Ensure you have the necessary tools and follow a detailed guide or tutorial.

8. How much does it cost to repair a P0122 code on a 2002 Nissan Altima Sedan?

The cost of repairing a P0122 code can vary depending on the exact cause of the issue and whether you do the repair yourself or take it to a professional mechanic. Costs may range from $100 to $300 or more.

9. Will a P0122 code on a 2002 Nissan Altima Sedan affect fuel efficiency?

Yes, a P0122 code can affect fuel efficiency because it can disrupt the proper functioning of the throttle position sensor, leading to inefficient fuel delivery and combustion.

10. How long does it typically take to repair a P0122 code on a 2002 Nissan Altima Sedan?

The repair time for a P0122 code can vary based on the specific cause of the issue and your repair skills. It may take anywhere from 1 to 3 hours for a professional mechanic to diagnose and fix the problem.

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