P2128 2009 Honda Accord Code - Accelerator Pedal Position Sensor 'B' Throttle Position Sensor 'D' Circuit High Voltage
Quick Answer
The P2128 diagnostic trouble code (DTC) for a 2009 Honda Accord refers to an issue with the Accelerator Pedal Position Sensor 'B' and Throttle Position Sensor 'D' circuit registering high voltage. Common causes include Faulty accelerator pedal position sensor, Faulty throttle position sensor, Damaged wiring or connectors in the sensor 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 2009 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, Faulty throttle position sensor, Damaged wiring or connectors in the sensor 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P2128 2009 Honda Accord Description
The P2128 diagnostic trouble code (DTC) for a 2009 Honda Accord refers to an issue with the Accelerator Pedal Position Sensor 'B' and Throttle Position Sensor 'D' circuit registering high voltage. This code indicates that there is an electrical problem in the circuit that controls the accelerator pedal position sensor and throttle position sensor, which are crucial components for the engine management system. These sensors work together to provide the engine control module (ECM) with data on the position of the accelerator pedal and throttle, allowing the ECM to adjust fuel delivery and engine performance accordingly.
Common Causes of P2128 2009 Honda Accord
- Faulty accelerator pedal position sensor
- Faulty throttle position sensor
- Damaged wiring or connectors in the sensor circuit
- Corrosion in the sensor connectors
- ECM malfunction
Symptoms of P2128 2009 Honda Accord
- Reduced engine power
- Hesitation or jerking during acceleration
- Engine stalling or rough idling
- Check Engine Light illuminated
- Limp mode activation
How to Fix P2128 2009 Honda Accord
- Use an OBD-II scanner to confirm the P2128 code and diagnose the specific cause.
- Inspect the wiring and connectors for any damage or corrosion. Repair or replace as needed.
- Test the accelerator pedal position sensor and throttle position sensor for proper operation. Replace if faulty.
- Clear the DTC and reset the ECM to see if the code returns.
- Test drive the vehicle to ensure the issue is resolved and the symptoms have disappeared.
Cost to Fix P2128 2009 Honda Accord
The typical repair costs for addressing the P2128 code on a 2009 Honda Accord can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the cost of diagnostic time, replacement sensors, wiring repairs, and any additional components that may need to be replaced. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle specifics.
Need more information about the P2128 2009 Honda Accord code?
Need more information on how to fix the P2128 2009 Honda Accord code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2128 2009 Honda Accord code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2128 2009 Honda Accord Code
1. What are common symptoms of OBDII code P2128 on a 2009 Honda Accord?
- Common symptoms include poor acceleration, limited engine power, and the vehicle going into limp mode.
2. What can cause the OBDII code P2128 on a 2009 Honda Accord?
- The code P2128 is typically caused by a faulty accelerator pedal position sensor or throttle position sensor, wiring issues, or a problem with the engine control module.
3. How can I diagnose the OBDII code P2128 on my 2009 Honda Accord?
- To diagnose the code P2128, you can use an OBDII scanner to retrieve the code and then inspect the accelerator pedal position sensor, throttle position sensor, and related wiring for any visible damage or issues.
4. Can I continue driving my 2009 Honda Accord with the OBDII code P2128?
- It is not recommended to continue driving with the code P2128 as it can lead to further damage to the engine and other components. It is best to have the issue diagnosed and repaired as soon as possible.
5. How can I repair the OBDII code P2128 on my 2009 Honda Accord?
- The repair for the code P2128 usually involves replacing the faulty accelerator pedal position sensor or throttle position sensor, repairing any damaged wiring, and clearing the code with an OBDII scanner.
6. Are there any DIY tips for fixing the OBDII code P2128 on a 2009 Honda Accord?
- DIY tips for fixing the code P2128 include checking the sensor connections, inspecting the wiring for any visible damage, and ensuring all electrical connections are secure before replacing any sensor.
7. Will resetting the OBDII code P2128 on my 2009 Honda Accord make it go away permanently?
- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not fixed, it is likely to return. It is important to diagnose and repair the root cause of the problem.
8. How much does it cost to repair the OBDII code P2128 on a 2009 Honda Accord?
- The cost of repairing the code P2128 can vary depending on the extent of the damage and whether you choose to do the repair yourself or take it to a professional mechanic. Costs can range from a few hundred dollars to over a thousand dollars.
9. Can a faulty accelerator pedal position sensor cause the OBDII code P2128 on a 2009 Honda Accord?
- Yes, a faulty accelerator pedal position sensor, also known as sensor 'B', can cause the code P2128 on a 2009 Honda Accord as it affects the throttle position sensor 'D' circuit.
10. Is it safe to drive my 2009 Honda Accord if the OBDII code P2128 is triggered?
- It is not recommended to drive your vehicle if the code P2128 is triggered, as it can lead to unsafe driving conditions due to reduced engine power and acceleration. It is best to address the issue promptly.
Discuss the causes and fixes for P2128 2009 Honda Accord OBDII Code
Code P2128 2009 Honda Accord comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.