AutoCodes.com
Login with Google
AutoCodes – Buick – C0594 Buick

C0594 Buick 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 Buick 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 1,096
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Jul 29, 2020
💬 Need more help? Ask Coddy for instant answers — it's free!

Code C0594 Buick 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 Buick - Right Rear Solenoid Circuit Open - AutoCodes.com
C0594 Buick Code - Right Rear Solenoid Circuit Open
What does this mean?

What are the Possible Causes of the DTC C0594 Buick?

  • 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 Buick?

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 Buick 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 Buick code?

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

Need Help with the Code?

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

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 Buick Code

1. What does the OBDII code C0594 mean for a Buick?

C0594 indicates an open circuit in the right rear solenoid of the suspension system, which may affect ride control.

2. What are common symptoms of code C0594 in a Buick?

Symptoms may include a warning light on the dashboard, poor ride quality, uneven suspension, or a noticeable sag in the rear of the vehicle.

3. What causes the C0594 code in a Buick?

Common causes include a damaged solenoid, corroded or broken wiring, loose connections, or a malfunctioning control module.

4. Can I drive my Buick with the C0594 code?

While the vehicle may still be drivable, it could experience compromised handling and ride comfort. It’s recommended to address the issue promptly.

5. How do I diagnose the C0594 code on my Buick?

Start by inspecting the wiring and connectors for damage or corrosion near the right rear solenoid. Use a multimeter to check for continuity in the circuit.

6. How can I fix the C0594 code on a Buick?

Repairs may include replacing the right rear solenoid, repairing or replacing damaged wiring, cleaning corroded connections, or resetting the control module.

7. How much does it cost to fix the C0594 code on a Buick?

Costs vary, but replacing a suspension solenoid typically ranges from $200 to $600, depending on labor rates and parts pricing.

8. Will clearing the C0594 code solve the problem?

Clearing the code without fixing the underlying issue will likely cause it to return. Proper diagnosis and repair are needed to resolve it permanently.

9. What tools are needed to troubleshoot the C0594 code on a Buick?

You’ll need an OBDII scanner, a multimeter for testing electrical continuity, and possibly a wiring diagram for your vehicle’s suspension system.

10. Is the C0594 code specific to Buicks with air suspension?

Yes, this code typically appears in Buicks equipped with electronically controlled air suspension systems.

Discuss the causes and fixes for C0594 Buick OBDII Code

Submit a New Comment

Code C0594 Buick comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play