AutoCodes – Honda – P1684 2009 Honda Accord

P1684 2009 Honda Accord Code - Throttle Valve Return Spring Performance Problem

Quick Answer

The electronic throttle control system controls the throttle valve opening. Common causes include Dirty throttle body, Throttle body harness is open or shorted, Throttle body 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: P1684 2009 Honda Accord indicates Throttle Valve Return Spring Performance Problem.
Common causes: Common causes include Dirty throttle body, Throttle body harness is open or shorted, Throttle body 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 2,369

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 Sep 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1684 2009 Honda Accord Description

The electronic throttle control system controls the throttle valve opening. The system is composed of the throttle actuator, the throttle valve, throttle position (TP) sensors A and B, the throttle actuator control module, the throttle actuator control module relay, the accelerator pedal position (APP) sensor, and the Engine Control Module (ECM).
The APP sensor is operated via the throttle cable to determine the accelerator opening value when the driver presses the accelerator pedal. The accelerator pedal opening value is converted to a signal in the APP sensor and transmitted to the ECM to compute the target position. The target position signal is then transmitted to the throttle actuator control module.
The throttle actuator control module determines the throttle valve target position according to the signal received and operates the throttle actuator to move the throttle valve to the target position. The actual throttle valve position is determined by TP sensor A installed in the throttle body.
The throttle actuator control module compares the throttle valve target opening angle and the actual throttle valve opening angle from TP sensor A, and when the difference exceeds the specification, the throttle actuator control module transmits the malfunction data to the ECM. When the ECM receives the malfunction data from the throttle actuator control module,the ECM detects the malfunction of the throttle actuator system and a DTC is stored.

OBDII Code P1684 2009 Honda Accord - Throttle Valve Return Spring Performance Problem - AutoCodes.com — P1684 2009 Honda Accord Code - Throttle Valve Return Spring Performance Problem

What does this mean?

What are the Possible Causes of the DTC P1684 2009 Honda Accord?

Dirty throttle body
Throttle body harness is open or shorted
Throttle body circuit poor electrical connection
Faulty throttle body

How to Fix the DTC P1684 2009 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1684 2009 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 P1684 2009 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 P1684 2009 Honda Accord Code

1. What are common symptoms of OBDII code P1684 in a 2009 Honda Accord related to Throttle Valve Return Spring Performance Problem?

The common symptoms include poor engine performance, rough idling, and potential stalling.

2. What causes the OBDII code P1684 in a 2009 Honda Accord to indicate a Throttle Valve Return Spring Performance Problem?

The code typically indicates an issue with the throttle valve return spring, which may be weak, broken, or improperly installed.

3. How can I diagnose the Throttle Valve Return Spring Performance Problem in my 2009 Honda Accord triggering the P1684 code?

A thorough inspection of the throttle body and its components, including the return spring, for any damage or wear is recommended. Additionally, checking for any loose connections or vacuum leaks is advisable.

4. Is it safe to continue driving my 2009 Honda Accord with the OBDII code P1684 related to the Throttle Valve Return Spring Performance Problem?

It is not recommended to drive the vehicle with this issue as it can lead to further damage and potential safety hazards. Prompt attention and repair are advised.

5. Can I reset the OBDII code P1684 on my 2009 Honda Accord without fixing the Throttle Valve Return Spring issue?

While you can clear the code temporarily, it will likely reappear until the underlying problem with the throttle valve return spring is addressed.

6. What are the repair options for fixing the Throttle Valve Return Spring Performance Problem causing the OBDII code P1684 in a 2009 Honda Accord?

Repair options include replacing the throttle valve return spring, ensuring it is correctly installed, and addressing any related issues like throttle body cleaning or calibration.

7. How much does it typically cost to repair the Throttle Valve Return Spring Performance Problem triggering the OBDII code P1684 on a 2009 Honda Accord?

The cost of repair can vary depending on the extent of the issue and whether other components need attention. It is advisable to consult a mechanic for an accurate estimate.

8. Can a DIY enthusiast fix the Throttle Valve Return Spring Performance Problem causing the OBDII code P1684 in a 2009 Honda Accord?

While some enthusiasts may have the skills to tackle this repair, it is recommended to seek professional help due to the importance of proper throttle system functioning.

9. Will fixing the Throttle Valve Return Spring Performance Problem resolve other related issues in my 2009 Honda Accord, apart from the OBDII code P1684?

Addressing the throttle valve return spring problem can improve overall engine performance, throttle response, and fuel efficiency in addition to resolving the specific OBDII code.

10. How often does the Throttle Valve Return Spring Performance Problem triggering the OBDII code P1684 occur in 2009 Honda Accords?

While not extremely common, this issue can arise due to wear and tear over time or improper maintenance of the throttle system. Regular inspections and maintenance can help prevent it.