AutoCodes – Honda – P2128 2010 Honda Accord

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

Quick Answer

Accelerator Pedal Position (APP) sensor B is a part of the Electronic Throttle Control System (ETCS), and it is used to convert the position of the accelerator pedal into electrical signals. Common causes include Faulty Accelerator Pedal Position, Accelerator Pedal Position harness is open or shorted, Accelerator Pedal Position circuit poor electrical connection. 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, Accelerator Pedal Position harness is open or shorted, Accelerator Pedal Position circuit poor electrical connection.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 4,747
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2128 2010 Honda Accord Description

Accelerator Pedal Position (APP) sensor B is a part of the Electronic Throttle Control System (ETCS), and it is used to convert the position of the accelerator pedal into electrical signals. Based on these signals, the Powertrain Control Module (PCM) controls the throttle actuator so that the throttle position agrees with the accelerator pedal position. If the signal voltage from APP sensor A is a set value or less, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).
OBDII Code P2128 2010 Honda Accord - Accelerator Pedal Position Sensor 'B' Throttle Position  Sensor 'D' Circuit High Voltage - AutoCodes.com
P2128 2010 Honda Accord Code - Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage

What are the Possible Causes of the DTC P2128 2010 Honda Accord?

  • Faulty Accelerator Pedal Position
  • Accelerator Pedal Position harness is open or shorted
  • Accelerator Pedal Position circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2128 2010 Honda Accord?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2128 2010 Honda Accord code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2128 2010 Honda Accord code?

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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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