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Engine-Codes – Honda – P2122 2009 Honda Accord

P2122 2009 Honda Accord Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage

Quick Answer

The P2122 diagnostic trouble code (DTC) in a 2009 Honda Accord relates to the Accelerator Pedal Position Sensor 1 Circuit registering a low voltage. Common causes include Faulty Accelerator Pedal Position Sensor, Wiring or connector issues in the sensor circuit, Corrosion or damage to sensor components. 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
P2122 2009 Honda Accord indicates Accelerator Pedal Position Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty Accelerator Pedal Position Sensor, Wiring or connector issues in the sensor circuit, Corrosion or damage to sensor components.
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 17, 2024
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Code P2122 2009 Honda Accord Description

The P2122 diagnostic trouble code (DTC) in a 2009 Honda Accord relates to the Accelerator Pedal Position Sensor 1 Circuit registering a low voltage. This sensor is crucial for the vehicle's Electronic Throttle Control System (ETCS) as it communicates the position of the accelerator pedal to the Engine Control Module (ECM). When the ECM detects a low voltage signal from the sensor, it triggers the P2122 code, indicating a potential issue with the sensor or its circuit.

OBDII Code P2122 2009 Honda Accord - Accelerator Pedal Position Sensor 1 Circuit Low Voltage
P2122 2009 Honda Accord Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage

Common Causes of P2122 2009 Honda Accord

  1. Faulty Accelerator Pedal Position Sensor.
  2. Wiring or connector issues in the sensor circuit.
  3. Corrosion or damage to sensor components.
  4. ECM software or hardware problems.
  5. Electrical system malfunctions affecting sensor communication.

Symptoms of P2122 2009 Honda Accord

  1. Reduced acceleration or lack of response when pressing the accelerator pedal.
  2. Engine stalling or hesitation during acceleration.
  3. Illumination of the Check Engine Light on the dashboard.
  4. Rough idling or uneven engine performance.
  5. Decreased fuel efficiency.

How to Fix P2122 2009 Honda Accord

  1. Begin by conducting a thorough inspection of the Accelerator Pedal Position Sensor and its wiring for any visible damage or corrosion.
  2. Test the sensor's voltage output using a multimeter to verify if it falls within the manufacturer's specified range.
  3. Replace the Accelerator Pedal Position Sensor if it is found to be faulty, ensuring to install a genuine OEM part for optimal performance.
  4. Clear the DTC using an OBD-II scanner and perform a test drive to confirm that the issue has been resolved.
  5. If the problem persists, further diagnostics may be necessary to identify any underlying ECM or wiring issues that could be causing the low voltage signal.

Cost to Fix P2122 2009 Honda Accord

The typical repair costs for addressing a P2122 code in a 2009 Honda Accord can range from $150 to $400, including parts and labor. However, it's important to note that actual costs may vary based on the specific diagnosis time, labor rates, and parts pricing at different auto repair shops. Rates can fluctuate depending on the location, vehicle make and model, and the expertise of the technicians. It's recommended to obtain quotes from multiple reputable repair facilities to compare prices and ensure a fair estimate for the repair.

What does this mean?

Tech Notes for P2122 2009 Honda Accord

ECM may need to updated

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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 P2122 2009 Honda Accord Code

1. What are the common symptoms of OBDII code P2122 on a 2009 Honda Accord?

The common symptoms of OBDII code P2122 on a 2009 Honda Accord include reduced engine power, hesitation during acceleration, and the vehicle going into "limp mode."

2. What does the OBDII code P2122 on a 2009 Honda Accord indicate?

The OBDII code P2122 on a 2009 Honda Accord indicates a low voltage condition in the Accelerator Pedal Position Sensor 1 circuit.

3. What are the possible causes of OBDII code P2122 on a 2009 Honda Accord?

Possible causes of OBDII code P2122 on a 2009 Honda Accord include a faulty Accelerator Pedal Position Sensor, damaged wiring or connectors, or a problem with the Engine Control Module (ECM).

4. How can I diagnose the OBDII code P2122 on a 2009 Honda Accord?

To diagnose OBDII code P2122 on a 2009 Honda Accord, you can use a scan tool to check for the code, inspect the wiring and connectors for damage, and test the Accelerator Pedal Position Sensor for proper voltage readings.

5. Can I continue driving my 2009 Honda Accord with the OBDII code P2122?

It is not recommended to drive your 2009 Honda Accord with the OBDII code P2122 as it can lead to performance issues and potential safety concerns. It is best to address the issue promptly.

6. How can I repair OBDII code P2122 on my 2009 Honda Accord?

To repair OBDII code P2122 on your 2009 Honda Accord, you may need to replace the Accelerator Pedal Position Sensor, repair any damaged wiring or connectors, or reset the Engine Control Module (ECM).

7. Will resetting the OBDII code P2122 on my 2009 Honda Accord fix the issue?

Resetting the OBDII code P2122 on your 2009 Honda Accord may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

8. Is it possible to prevent OBDII code P2122 from occurring on my 2009 Honda Accord?

To prevent OBDII code P2122 on your 2009 Honda Accord, it is essential to perform regular maintenance, promptly address any engine performance issues, and ensure the Accelerator Pedal Position Sensor is functioning properly.

9. Can a DIY enthusiast fix OBDII code P2122 on a 2009 Honda Accord?

Depending on your skill level and access to tools, a DIY enthusiast may be able to diagnose and repair OBDII code P2122 on a 2009 Honda Accord. However, complex electrical issues may require professional assistance.

10. How much does it cost to repair OBDII code P2122 on a 2009 Honda Accord?

The cost to repair OBDII code P2122 on a 2009 Honda Accord can vary depending on the cause of the issue, parts needed for replacement, and labor costs. It is recommended to obtain quotes from different auto repair shops for an accurate estimate.

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