AutoCodes – Buick – C0593 Buick

C0593 Buick Code - Right Rear Solenoid Circuit High

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: C0593 Buick indicates Right Rear Solenoid Circuit High.
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.

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Code Popularity 674

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
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Code C0593 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 C0593 Buick - Right Rear Solenoid Circuit High - AutoCodes.com — C0593 Buick Code - Right Rear Solenoid Circuit High

What does this mean?

What are the Possible Causes of the DTC C0593 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 C0593 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 C0593 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.

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Need Help with the 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 C0593 Buick Code

1. What does the OBDII code C0593 mean on a Buick?

C0593 indicates a "Right Rear Solenoid Circuit High" fault, meaning there is an issue with the electrical circuit controlling the right rear suspension solenoid.

2. What are the symptoms of code C0593 on a Buick?

Common symptoms include a rough or uneven ride, suspension warning lights on the dashboard, and potentially reduced handling performance.

3. What causes the C0593 code to appear?

The code can be triggered by a damaged solenoid, corroded or loose electrical connections, a short or open circuit in the wiring, or a faulty suspension control module.

4. Can I drive my Buick with a C0593 code?

While it may be safe to drive for short distances, ignoring the issue can lead to poor handling and further suspension damage. Itâ€™s best to address the problem promptly.

5. How is the C0593 code diagnosed?

A technician will typically inspect the solenoid and its wiring, check for continuity in the circuit, and use a scan tool to verify the fault and test related components.

6. How do I fix the C0593 code on my Buick?

Repairs may involve replacing the right rear solenoid, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the suspension control module.

7. What tools are needed to troubleshoot the C0593 code?

You may need an OBDII scanner, a multimeter to test electrical continuity, and basic tools to access and inspect the suspension components.

8. How much does it cost to repair a C0593 code on a Buick?

Repair costs can vary. Replacing a solenoid may cost $200-$500, while wiring repairs or module replacements could increase the total cost.

9. Can a weak battery cause the C0593 code?

Yes, a weak or failing battery can cause electrical issues, including triggering suspension-related fault codes like C0593.

10. Does the C0593 code require suspension recalibration after repair?

In some cases, after replacing components or making repairs, the suspension system may need recalibration using specialized tools to ensure proper operation.