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Engine-Codes – Honda – P2128 2010 Honda Accord

P2128 2010 Honda Accord Code - Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage

Quick Answer

The P2128 code on a 2010 Honda Accord indicates a problem with the Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage. Common causes include Faulty Accelerator Pedal Position Sensor 'B', Faulty Throttle Position Sensor 'D', Wiring or connector issues in the circuit. 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
P2128 2010 Honda Accord indicates Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage.
Common causes
Common causes include Faulty Accelerator Pedal Position Sensor 'B', Faulty Throttle Position Sensor 'D', Wiring or connector issues in the circuit.
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 P2128 2010 Honda Accord Description

The P2128 code on a 2010 Honda Accord indicates a problem with the Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage. This means that the voltage detected in the circuit for these sensors is higher than the specified range. These sensors play a crucial role in the operation of the vehicle's electronic throttle control system. The Accelerator Pedal Position Sensor 'B' is located on the accelerator pedal and sends a signal to the Engine Control Module (ECM) indicating the position of the accelerator pedal. The Throttle Position Sensor 'D' is located on the throttle body and informs the ECM about the position of the throttle plate.

OBDII Code P2128 2010 Honda Accord - Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage
P2128 2010 Honda Accord Code - Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage

Common Causes of P2128 2010 Honda Accord

  1. Faulty Accelerator Pedal Position Sensor 'B'.
  2. Faulty Throttle Position Sensor 'D'.
  3. Wiring or connector issues in the circuit.
  4. Corrosion or damage to sensor connectors.
  5. ECM malfunction.

Symptoms of P2128 2010 Honda Accord

  1. Hesitation or lack of response when pressing the accelerator pedal.
  2. Engine power loss or reduced acceleration.
  3. Rough idling or stalling.
  4. Check Engine Light illuminated on the dashboard.
  5. Vehicle going into limp mode.

How to Fix P2128 2010 Honda Accord

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the trouble codes and confirm the issue.
  2. Inspect the wiring and connectors related to the Accelerator Pedal Position Sensor 'B' and Throttle Position Sensor 'D' for any damage or corrosion.
  3. Test the sensors using a multimeter to check for proper voltage output.
  4. If the sensors are faulty, replace them with new ones following the manufacturer's guidelines.
  5. Clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2128 2010 Honda Accord

The cost of repairing the Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage issue can vary depending on the extent of the problem and the cost of parts and labor. Typically, the replacement sensors can range from $50 to $150 each, while the labor cost can be around $100 to $200. Overall, the total repair cost may range from $200 to $500. It's important to note that these are rough estimates, and actual costs may vary based on the specific diagnosis time and labor rates at auto repair shops. It's recommended to obtain quotes from local shops for a more accurate cost estimate.

What does this mean?

Tech Notes for P2128 2010 Honda Accord

ECM may have to be 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 P2128 2010 Honda Accord Code

1. What are the common symptoms of OBDII code P2128 in a 2010 Honda Accord?

- Common symptoms include rough idling, reduced engine power, hesitation during acceleration, and the vehicle going into limp mode.

2. What causes the OBDII code P2128 in a 2010 Honda Accord?

- The code is usually triggered by a fault in the accelerator pedal position sensor 'B' or throttle position sensor 'D', leading to high voltage in the circuit.

3. Can driving with OBDII code P2128 in a 2010 Honda Accord cause further damage?

- Continuing to drive with this code can potentially cause damage to the engine or transmission due to the vehicle operating in a reduced power mode.

4. How can I diagnose OBDII code P2128 in my 2010 Honda Accord?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the wiring connections to the sensors, and testing the sensors themselves for proper function.

5. What are the repair options for fixing OBDII code P2128 in a 2010 Honda Accord?

- Repair options may include replacing the accelerator pedal position sensor 'B', throttle position sensor 'D', or repairing any damaged wiring or connectors in the circuit.

6. Can I fix OBDII code P2128 in my 2010 Honda Accord myself?

- While some DIY enthusiasts may attempt the repair, it is recommended to have a professional diagnose and repair this code to ensure proper functioning of the sensors.

7. How much does it cost to repair OBDII code P2128 in a 2010 Honda Accord?

- The cost of repair can vary depending on the extent of the damage and whether sensors or wiring need replacement, but it typically ranges from $200 to $500 at a repair shop.

8. Will resetting the OBDII code P2128 in my 2010 Honda Accord make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not fixed, it will likely reappear.

9. Are there any preventive measures to avoid OBDII code P2128 in a 2010 Honda Accord?

- Regular maintenance and inspections of the sensors and wiring can help prevent issues that may lead to the activation of this code.

10. Can a faulty accelerator pedal position sensor 'B' or throttle position sensor 'D' cause other OBDII codes to trigger in a 2010 Honda Accord?

- Yes, a malfunctioning sensor can cause related codes to trigger, such as P2127 (Accelerator Pedal Position Sensor 'E' Circuit Low Voltage) or P2138 (Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation).

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