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Engine-Codes – Honda – P0122 1996 Honda Civic

P0122 1996 Honda Civic Code - Throttle Position Sensor 'A' Circuit Low Voltage

Quick Answer

The P0122 diagnostic trouble code (DTC) specifically refers to the Throttle Position Sensor (TPS) 'A' Circuit Low Voltage in a 1996 Honda Civic. Common causes include Worn-out or faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the 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 1996 Honda Civic indicates Throttle Position Sensor 'A' Circuit Low Voltage.
Common causes
Common causes include Worn-out or faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the 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 08, 2024
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Code P0122 1996 Honda Civic Description

The P0122 diagnostic trouble code (DTC) specifically refers to the Throttle Position Sensor (TPS) 'A' Circuit Low Voltage in a 1996 Honda Civic. The TPS is a crucial component of the vehicle's electronic fuel injection system, responsible for monitoring the throttle position and sending this information to the engine control unit (ECU). The ECU utilizes this data to adjust the air-fuel mixture and ensure optimal engine performance.

OBDII Code P0122 1996 Honda Civic - Throttle Position Sensor 'A' Circuit Low Voltage
P0122 1996 Honda Civic Code - Throttle Position Sensor 'A' Circuit Low Voltage

Common Causes of P0122 1996 Honda Civic

  1. Worn-out or faulty throttle position sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion or contamination in the sensor
  4. Malfunctioning engine control unit (ECU)
  5. Improper installation of the TPS

Symptoms of P0122 1996 Honda Civic

  1. Hesitation or jerking during acceleration
  2. Rough idling or stalling
  3. Reduced fuel efficiency
  4. Illuminated check engine light
  5. Difficulty maintaining a consistent speed

How to Fix P0122 1996 Honda Civic

  1. Diagnose the issue by using a scan tool to read the DTC and testing the TPS voltage with a multimeter.
  2. Inspect the TPS wiring and connectors for any signs of damage or corrosion.
  3. Replace the throttle position sensor if it is determined to be faulty. Ensure proper installation and calibration.
  4. Clear the DTC and reset the ECU to allow it to relearn the new TPS values.
  5. Perform a test drive to ensure the issue has been resolved and that the vehicle is performing optimally.

Cost to Fix P0122 1996 Honda Civic

The typical cost to repair a Throttle Position Sensor 'A' Circuit Low Voltage issue in a 1996 Honda Civic can range from $100 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more accurate estimate. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops.

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 1996 Honda Civic Code

1. What are the common symptoms of OBDII code P0122 in a 1996 Honda Civic?

- Common symptoms include poor acceleration, stalling, rough idling, and potential issues with the transmission shifting.

2. What does the OBDII code P0122 'Throttle Position Sensor A Circuit Low Voltage' mean for a 1996 Honda Civic?

- This code indicates that the throttle position sensor is sending a lower than expected voltage signal to the engine control module.

3. What are the possible causes of the P0122 code in a 1996 Honda Civic?

- The common causes include a faulty throttle position sensor, damaged wiring or connectors, issues with the throttle body, or a problem with the engine control module.

4. How can I diagnose the throttle position sensor in a 1996 Honda Civic with code P0122?

- You can use a multimeter to check the voltage output of the sensor, inspect the wiring for any damage, and ensure proper connection to the throttle body.

5. Can I drive my 1996 Honda Civic with the P0122 code?

- It is not recommended to drive the vehicle with this code as it can lead to poor performance and potential safety issues. It's best to address the problem promptly.

6. How do I repair the 'Throttle Position Sensor A Circuit Low Voltage' code in my 1996 Honda Civic?

- The repair typically involves replacing the throttle position sensor, checking and repairing any damaged wiring, and resetting the trouble code with an OBDII scanner.

7. Are there any DIY tips for fixing the P0122 code in a 1996 Honda Civic?

- DIY enthusiasts can attempt to replace the throttle position sensor themselves using basic tools and following the vehicle's repair manual for guidance.

8. Is it safe to reset the OBDII code P0122 in my 1996 Honda Civic without fixing the underlying issue?

- It is not recommended to reset the code without addressing the problem as it may lead to further damage to the vehicle and potentially unsafe driving conditions.

9. How much does it cost to repair the throttle position sensor issue causing code P0122 in a 1996 Honda Civic?

- The cost can vary depending on the extent of the problem, but typically, replacing the throttle position sensor can range from $50 to $200 including parts and labor.

10. Can a faulty throttle position sensor causing code P0122 affect the fuel efficiency of a 1996 Honda Civic?

- Yes, a faulty throttle position sensor can lead to poor fuel efficiency as it affects how the engine adjusts its performance based on throttle input, potentially causing it to run rich or lean.

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