AutoCodes – GMC – C0594 GMC

C0594 GMC 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 GMC 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.

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Code Popularity 1,131

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

What does this mean?

What are the Possible Causes of the DTC C0594 GMC?

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 GMC?

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 GMC 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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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 GMC Code

1. What are the common symptoms of OBDII code C0594 in a GMC indicating a Right Rear Solenoid Circuit Open?

The common symptoms include issues with the right rear brake system, such as uneven braking, brake drag, or the ABS light being illuminated on the dashboard.

2. What are the possible causes of OBDII code C0594 GMC indicating a Right Rear Solenoid Circuit Open?

The code can be triggered by a faulty right rear solenoid, damaged wiring or connectors in the circuit, or a malfunction in the ABS control module.

3. How can I diagnose the OBDII code C0594 in my GMC related to the Right Rear Solenoid Circuit Open?

Diagnosis involves using a scan tool to retrieve the specific code, then inspecting the right rear solenoid, checking the wiring and connectors for damage, and testing the ABS module for proper functionality.

4. Can I continue driving my GMC with OBDII code C0594 indicating a Right Rear Solenoid Circuit Open?

It is not recommended to drive the vehicle with this code present, as it can affect the proper operation of the ABS system and compromise braking performance.

5. How can I repair OBDII code C0594 GMC related to a Right Rear Solenoid Circuit Open?

Repair may involve replacing the right rear solenoid, repairing any damaged wiring or connectors, or reprogramming the ABS control module to address the issue.

6. Are there any DIY tips for troubleshooting OBDII code C0594 in my GMC for a Right Rear Solenoid Circuit Open?

While some basic inspections like checking for loose connections or damaged wires can be done DIY, it is recommended to have a professional diagnose and repair complex ABS system issues.

7. Will resetting the OBDII code C0594 in my GMC related to a Right Rear Solenoid Circuit Open make it go away permanently?

Simply resetting the code without addressing the underlying issue will not make it disappear permanently. The root cause of the problem needs to be identified and fixed for a lasting solution.

8. How much does it cost to repair OBDII code C0594 GMC indicating a Right Rear Solenoid Circuit Open?

The cost of repair can vary depending on the exact cause of the issue, parts needed, and labor rates. It's advisable to get a few quotes from reputable mechanics for an accurate estimate.

9. Can extreme weather conditions or rough driving cause OBDII code C0594 in a GMC for a Right Rear Solenoid Circuit Open?

While extreme conditions can potentially impact the ABS system, the code is more likely triggered by component failures or electrical issues rather than external factors.

10. Is OBDII code C0594 GMC related to a Right Rear Solenoid Circuit Open a common issue in certain GMC models?

This specific OBDII code may be more prevalent in certain GMC models with ABS systems prone to solenoid failures or wiring issues, but it can occur in various vehicles with similar ABS setups.