AutoCodes – Generic – C1661

C1661 Code - 4WAS Front Lock Solenoid Valve

Quick Answer

The 4 Wheel Active Steer (4WAS) Front Lock Solenoid Valve is activated in the active test (lock release). Common causes include Faulty 4WAS Front Control Unit, Faulty 4WAS Front Lock Solenoid Valve, 4WAS Front Lock Solenoid Valve 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: C1661 indicates 4WAS Front Lock Solenoid Valve.
Common causes: Common causes include Faulty 4WAS Front Control Unit, Faulty 4WAS Front Lock Solenoid Valve, 4WAS Front Lock Solenoid Valve 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.

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Code Popularity 1,365

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1661 Description

The 4 Wheel Active Steer (4WAS) Front Lock Solenoid Valve is activated in the active test (lock release). The secured 4WAS front actuator is released. 4WAS Front Control Unit controls 4WAS front actuator. 4WAS front actuator releases the lock when the engine speed signal is ON. 4WAS front actuator applies the lock when the engine speed signal is OFF.

OBDII Code C1661 - 4WAS Front Lock Solenoid Valve - AutoCodes.com — C1661 Code - 4WAS Front Lock Solenoid Valve

What does this mean?

What are the Possible Causes of the DTC C1661?

Faulty 4WAS Front Control Unit
Faulty 4WAS Front Lock Solenoid Valve
4WAS Front Lock Solenoid Valve harness is open or shorted
4WAS Front Lock Solenoid Valve circuit poor electrical connection

How to Fix the DTC C1661?

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 C1661 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 C1661 code?

Need more information on how to fix the C1661 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1661 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1661 Infiniti — 4WAS Front Lock Solenoid Valve
C1661 Nissan — 4WAS Front Lock Solenoid Valve

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 C1661 Code

1. What are common symptoms of OBDII code C1661 (4WAS Front Lock Solenoid Valve)?

- Common symptoms include difficulty engaging or disengaging the front wheel drive, illuminated warning lights on the dashboard, and potential loss of traction control functionality.

2. What can cause OBDII code C1661 to trigger?

- The code C1661 is typically triggered by a malfunction in the 4WAS Front Lock Solenoid Valve, which can be caused by electrical faults, wiring issues, or a defective solenoid valve itself.

3. How can I diagnose the 4WAS Front Lock Solenoid Valve issue triggering code C1661?

- Diagnosis involves inspecting the wiring harness for any damage, testing the solenoid valve for proper functionality, and using a diagnostic scanner to read and clear the error code.

4. Can a DIY enthusiast repair the 4WAS Front Lock Solenoid Valve issue associated with code C1661?

- While some basic troubleshooting like checking the wiring connections can be done by DIYers, repairing or replacing the solenoid valve may require specialized tools and expertise, making it advisable to seek professional help.

5. Are there any quick tips to address OBDII code C1661 temporarily?

- Resetting the error code using an OBDII scanner can sometimes temporarily clear the code, but it is essential to address the underlying issue with the 4WAS Front Lock Solenoid Valve to prevent further problems.

6. Is it safe to continue driving with OBDII code C1661 active?

- It is not recommended to drive with an active OBDII code C1661 as it can lead to potential safety hazards, reduced traction control, and further damage to the vehicle's drivetrain components.

7. How much does it typically cost to repair the 4WAS Front Lock Solenoid Valve issue related to code C1661?

- The cost of repair can vary depending on the extent of the problem, the labor rates in your area, and whether the solenoid valve needs to be repaired or replaced. It's best to consult a mechanic for an accurate estimate.

8. Can extreme weather conditions affect the 4WAS Front Lock Solenoid Valve and trigger code C1661?

- Yes, extreme temperatures or moisture exposure can potentially affect the solenoid valve's performance, leading to the triggering of code C1661. It's important to keep the valve and its connections protected.

9. Are there any preventive maintenance steps to avoid OBDII code C1661 in the future?

- Regularly inspecting the wiring harness for damage, keeping the solenoid valve clean and free of debris, and addressing any warning lights promptly can help prevent the recurrence of OBDII code C1661.

10. How long does it typically take to repair the 4WAS Front Lock Solenoid Valve issue causing code C1661?

- The repair time can vary based on the extent of the problem, availability of parts, and the technician's expertise. In general, it can take a few hours to a day to diagnose and repair the issue.