P1684 Acura Code - Throttle Valve Return Spring Performance Problem
Quick Answer
The Electronic Throttle Control System (ETCS) controls the throttle valve opening. Common causes include Dirty throttle body, Faulty Electronic Throttle Control System (ETCS), Electronic Throttle Control System (ETCS) harness is open or shorted. 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 Acura indicates Throttle Valve Return Spring Performance Problem.
- Common causes
- Common causes include Dirty throttle body, Faulty Electronic Throttle Control System (ETCS), Electronic Throttle Control System (ETCS) harness is open or shorted.
- 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.
Code P1684 Acura Description
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.
What are the Possible Causes of the DTC P1684 Acura?
- Dirty throttle body
- Faulty Electronic Throttle Control System (ETCS)
- Electronic Throttle Control System (ETCS) harness is open or shorted
- Electronic Throttle Control System (ETCS) circuit poor electrical connection
How to Fix the DTC P1684 Acura?
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 Acura 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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Frequently Asked Questions about P1684 Acura Code
1. What does the OBDII code P1684 mean on an Acura?
P1684 indicates a "Throttle Valve Return Spring Performance Problem," meaning there is an issue with the throttle return spring mechanism.
2. What are the common symptoms of the P1684 code on an Acura?
Symptoms may include rough idling, reduced throttle response, unexpected acceleration or deceleration, and the check engine light being illuminated.
3. What causes the P1684 code on an Acura?
Causes may include a worn-out or damaged throttle return spring, carbon buildup around the throttle valve, or issues with the throttle body assembly.
4. Can I drive my Acura with the P1684 code?
Driving with the P1684 code is not recommended, as it can lead to unpredictable throttle behavior, which may compromise safety.
5. How do I diagnose the P1684 code on an Acura?
Start by inspecting the throttle valve return spring for wear or damage, check for carbon buildup in the throttle body, and ensure the throttle body linkage is functioning properly.
6. How is the P1684 code fixed on an Acura?
Repair involves cleaning the throttle body, replacing the throttle return spring if damaged, and ensuring the throttle body assembly is properly calibrated.
7. How much does it cost to repair the P1684 code on an Acura?
Repair costs vary but can range from $100 to $300 depending on whether the throttle spring needs replacement or the throttle body requires cleaning.
8. Can a dirty throttle body trigger the P1684 code on an Acura?
Yes, carbon buildup or debris in the throttle body can restrict the throttle valve’s movement and affect the return spring's performance.
9. Do I need to replace the entire throttle body to fix the P1684 code?
Not necessarily. If the issue is limited to the throttle return spring or carbon buildup, cleaning or spring replacement may suffice.
10. Will resetting the ECU clear the P1684 code on an Acura?
Resetting the ECU may temporarily clear the code, but if the underlying issue isn’t resolved, the code will likely return.
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