AutoCodes – Generic – C0594

C0594 Code - Right Rear Solenoid Circuit Open

Quick Answer

The strut actuator is controlled by the Continuously Variable Road Sensing Suspension (CVRSS) module with a Pulse-Width Modulation (PWM) signal. Common causes include Faulty Right Rear Solenoid, Right Rear Solenoid harness is open or shorted, Right Rear Solenoid 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: C0594 indicates Right Rear Solenoid Circuit Open.
Common causes: Common causes include Faulty Right Rear Solenoid, Right Rear Solenoid harness is open or shorted, Right Rear Solenoid 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,934

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 Jul 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C0594 Description

The strut actuator is controlled by the Continuously Variable Road Sensing Suspension (CVRSS) module with a Pulse-Width Modulation (PWM) signal. Switching the voltage ON and OFF at a high frequency, or pulse width modulation of 2.0 kHz, controls the amount of current delivered to the actuator. By controlling the amount of current to the actuator the CVRSS module controls the damping force in the strut. A higher level of damping force is achieved by providing correspondingly higher current levels, relating to higher percentages of PWM duty cycle. The default damper state, no battery voltage is one that provides a minimum damping force. The CVRSS module periodically commands each strut actuator to a preset PWM duty cycle in order to override the normal PWM command. During this preset PWM duty cycle, the CVRSS module is able to perform a diagnostic test on each strut actuator to determine if a malfunction is present. The preset PWM command can be either an OFF or ON state duty cycle.

OBDII Code C0594 - Right Rear Solenoid Circuit Open - AutoCodes.com — C0594 Code - Right Rear Solenoid Circuit Open

What does this mean?

What are the Possible Causes of the DTC C0594?

Faulty Right Rear Solenoid
Right Rear Solenoid harness is open or shorted
Right Rear Solenoid circuit poor electrical connection

How to Fix the DTC C0594?

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 C0594 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 C0594 code?

Need more information on how to fix the C0594 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0594 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0594 Buick — Right Rear Solenoid Circuit Open
C0594 Cadillac — Right Rear Solenoid Circuit Open
C0594 Chevrolet — Right Rear Solenoid Circuit Open
C0594 GMC — Right Rear Solenoid Circuit Open

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 C0594 Code

1. What are the common symptoms of OBDII code C0594 (Right Rear Solenoid Circuit Open)?

The common symptoms of this code include the ABS warning light illuminating on the dashboard, potential loss of traction control functionality, and issues with the rear brake system.

2. What could cause the OBDII code C0594 to trigger?

The OBDII code C0594 (Right Rear Solenoid Circuit Open) is typically triggered by a fault in the wiring harness leading to the right rear solenoid or a malfunction within the solenoid itself.

3. How can I diagnose the root cause of OBDII code C0594?

Diagnosing the cause of C0594 involves conducting a visual inspection of the wiring harness and connectors, testing the solenoid for proper continuity and voltage, and using a scan tool to retrieve additional diagnostic trouble codes.

4. Is it safe to drive with OBDII code C0594 active?

It is not recommended to drive with OBDII code C0594 active, as it can affect the proper functioning of the ABS system and traction control, potentially compromising your vehicle's safety on the road.

5. Can I repair OBDII code C0594 on my own?

Depending on your level of automotive expertise, you may be able to repair OBDII code C0594 on your own by addressing the wiring issues, replacing the solenoid, or repairing any damaged connectors. However, professional assistance is recommended for accurate diagnosis and repair.

6. How much does it typically cost to repair OBDII code C0594?

The cost of repairing OBDII code C0594 can vary depending on the extent of the damage, the need for replacement parts, and labor costs. It is advisable to obtain quotes from reputable automotive repair shops for an accurate estimate.

7. Can a faulty ABS sensor cause OBDII code C0594 to appear?

While a faulty ABS sensor may not directly cause OBDII code C0594, it can contribute to issues within the ABS system that may lead to related fault codes being triggered. It is important to address all ABS-related faults to ensure proper functionality.

8. Will resetting the OBDII code C0594 make it go away permanently?

Resetting the OBDII code C0594 may temporarily clear the fault code, but if the underlying issue causing the code is not addressed, it is likely to reappear once the system detects the fault again. It is crucial to diagnose and resolve the root cause of the code.

9. Are there any preventive maintenance tips to avoid OBDII code C0594 in the future?

To prevent OBDII code C0594 from occurring in the future, it is advisable to regularly inspect the wiring harness, connectors, and solenoids in the ABS system for signs of wear, corrosion, or damage. Keeping up with routine maintenance can help identify potential issues early.

10. How long does it typically take to repair OBDII code C0594?

The repair time for OBDII code C0594 can vary depending on the complexity of the issue, the availability of replacement parts, and the technician's expertise. In general, the repair process may take a few hours to a full day to complete.