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Engine-Codes – Honda – P1122 2000 Honda Civic

P1122 2000 Honda Civic Code - Throttle Position Sensor Signal Higher Than Expected

Quick Answer

The P1122 code for a 2000 Honda Civic indicates that the throttle position sensor (TPS) is sending a signal that is higher than what is expected by the engine control module (ECM). Common causes include Faulty throttle position sensor, Wiring issues in the TPS circuit, Poor electrical connection between the TPS and 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
P1122 2000 Honda Civic indicates Throttle Position Sensor Signal Higher Than Expected.
Common causes
Common causes include Faulty throttle position sensor, Wiring issues in the TPS circuit, Poor electrical connection between the TPS and 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 P1122 2000 Honda Civic Description

The P1122 code for a 2000 Honda Civic indicates that the throttle position sensor (TPS) is sending a signal that is higher than what is expected by the engine control module (ECM). The TPS is a sensor that monitors the position of the throttle valve, which determines how much air enters the engine. This information is crucial for the ECM to calculate the appropriate fuel injection and ignition timing. When the TPS signal is higher than expected, it can lead to incorrect fuel delivery, affecting the engine's performance and efficiency.

OBDII Code P1122 2000 Honda Civic - Throttle Position Sensor Signal Higher Than Expected
P1122 2000 Honda Civic Code - Throttle Position Sensor Signal Higher Than Expected

Common Causes of P1122 2000 Honda Civic

  1. Faulty throttle position sensor
  2. Wiring issues in the TPS circuit
  3. Poor electrical connection between the TPS and ECM
  4. Malfunctioning ECM
  5. Environmental factors causing interference with TPS signal transmission

Symptoms of P1122 2000 Honda Civic

  1. Poor acceleration or hesitation when pressing the gas pedal
  2. Rough idling or stalling at idle
  3. Decreased fuel efficiency
  4. Engine misfires or hesitation during acceleration
  5. Illumination of the check engine light on the dashboard

How to Fix P1122 2000 Honda Civic

  1. Begin by connecting an OBD-II scanner to the vehicle's diagnostic port to retrieve the specific trouble code (P1122) and confirm the issue.
  2. Inspect the throttle position sensor and its wiring for any signs of damage, wear, or corrosion. Replace the TPS if necessary.
  3. Check the electrical connections between the TPS and ECM for any loose or damaged wires. Repair or replace any faulty connections.
  4. Clear the trouble code from the ECM's memory using the OBD-II scanner and perform a test drive to ensure the issue is resolved.
  5. If the problem persists, further diagnostics may be needed to identify any underlying issues with the ECM or other related components.

Cost to Fix P1122 2000 Honda Civic

The cost of repairing a throttle position sensor signal higher than expected (P1122) in a 2000 Honda Civic can vary depending on the specific cause of the issue. In general, the price range for this repair can be between $100 to $300 for parts and labor. However, it's important to note that labor rates at auto repair shops can range from $80 to $150 per hour. Additional costs may apply if further diagnostics or component replacements are necessary. It's recommended to consult with a qualified mechanic or service center for a more accurate estimate based on your location and vehicle specifics.

What does this mean?

Tech Notes for P1122 2000 Honda Civic

You can try to clean the throttle body but in many case the throttle body will have to be replaced.

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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 P1122 2000 Honda Civic Code

1. What are the common symptoms of OBDII code P1122 in a 2000 Honda Civic?

- Common symptoms include poor acceleration, rough idling, stalling, and potential issues with the vehicle's fuel efficiency.

2. What does OBDII code P1122 indicate in a 2000 Honda Civic?

- This code indicates that the throttle position sensor signal is higher than expected, suggesting a problem with the sensor or its circuitry.

3. What are the possible causes of OBDII code P1122 in a 2000 Honda Civic?

- The possible causes include a faulty throttle position sensor, damaged sensor wiring, poor electrical connections, or issues with the engine control module.

4. How can I diagnose the root cause of OBDII code P1122 in my 2000 Honda Civic?

- Diagnosing the issue typically involves checking the throttle position sensor's voltage output, inspecting the sensor wiring for damage, and testing the electrical connections.

5. Can I drive my 2000 Honda Civic with OBDII code P1122?

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

6. How can I repair OBDII code P1122 in my 2000 Honda Civic?

- Repair options may include replacing the throttle position sensor, repairing or replacing damaged wiring, ensuring proper electrical connections, or resetting the engine control module.

7. Is it possible to reset OBDII code P1122 in a 2000 Honda Civic without repairs?

- While clearing the code may temporarily turn off the check engine light, it's crucial to address the underlying issue causing the code to prevent further problems.

8. How much does it cost to fix OBDII code P1122 in a 2000 Honda Civic?

- The cost of repair can vary depending on the specific cause of the code, parts needed, and labor costs. It's advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P1122 in a 2000 Honda Civic?

- DIY enthusiasts with automotive repair experience may be able to address this issue by following repair guides and using appropriate tools. However, caution is advised to ensure proper diagnosis and repair.

10. How long does it take to repair OBDII code P1122 in a 2000 Honda Civic?

- The repair time can vary based on the specific cause of the code, the complexity of the repair, and the individual's experience level. It may take a few hours to a full day to complete the repair.

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