AutoCodes – Honda – P2122 2008 Honda Accord

P2122 2008 Honda Accord Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage

Quick Answer

Accelerator Pedal Position (APP) Sensor 1 (Throttle Position Sensor D) Circuit Low Voltage. 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: P2122 2008 Honda Accord indicates Accelerator Pedal Position Sensor 1 Circuit Low 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.

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Code Popularity 6,978

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2122 2008 Honda Accord Description

Accelerator Pedal Position (APP) Sensor 1 (Throttle Position Sensor D) Circuit Low Voltage. The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position and sends a signal to the Engine Control Module (ECM).

OBDII Code P2122 2008 Honda Accord - Accelerator Pedal Position Sensor 1 Circuit Low Voltage - AutoCodes.com — P2122 2008 Honda Accord Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2122 2008 Honda Accord?

Faulty Accelerator Pedal Position
Accelerator Pedal Position harness is open or shorted
Accelerator Pedal Position circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2122 2008 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.

What does this mean?

Code Tech Notes

ECU may need to updated

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2122 2008 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.

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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 2008 Honda Accord Code

1. What does OBDII code P2122 mean on a 2008 Honda Accord?

P2122 indicates that the Accelerator Pedal Position (APP) Sensor 1 circuit is registering a low voltage signal, which can affect throttle response and vehicle performance.

2. What are the common symptoms of code P2122 in a 2008 Honda Accord?

Symptoms may include reduced throttle response, the engine entering "limp mode," illumination of the Check Engine Light, and inconsistent acceleration.

3. What causes the P2122 code to appear?

Common causes include a faulty APP sensor, damaged or corroded wiring, a poor electrical connection, or issues with the Engine Control Module (ECM).

4. Can I drive my 2008 Honda Accord with a P2122 code?

Driving with a P2122 code is not recommended, as it may result in limited throttle response or unsafe driving conditions if the vehicle enters limp mode.

5. How do you diagnose the P2122 code on a 2008 Honda Accord?

Diagnosis involves checking the APP sensor for proper voltage, inspecting the wiring and connectors for damage or corrosion, and testing the ECM to rule out internal faults.

6. How is the P2122 code typically fixed?

Repairs may include replacing the APP sensor, repairing or replacing damaged wiring or connectors, cleaning corroded connections, or reprogramming or replacing the ECM.

7. What tools are needed to troubleshoot the P2122 code?

A digital multimeter, an OBDII scanner, and basic hand tools are typically needed to diagnose and repair issues related to the P2122 code.

8. How much does it cost to repair a P2122 code on a 2008 Honda Accord?

Repair costs can vary, but replacing the APP sensor typically ranges from $150 to $300, including parts and labor, while other repairs may vary depending on the issue.

9. Can a dirty throttle body cause the P2122 code?

While a dirty throttle body is not a direct cause of P2122, it can exacerbate throttle-related issues. Cleaning the throttle body may help improve overall performance but won't resolve a low-voltage APP sensor circuit issue.

10. Does the P2122 code always mean the APP sensor is bad?

No, the P2122 code can also be triggered by wiring issues, poor connections, or a malfunctioning ECM, so the APP sensor should be tested before replacement.