AutoCodes – Buick – C0587 Buick

C0587 Buick Code - Left Rear Solenoid Circuit Low

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 Left Rear Solenoid, Left Rear Solenoid harness is open or shorted, Left 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
C0587 Buick indicates Left Rear Solenoid Circuit Low.
Common causes
Common causes include Faulty Left Rear Solenoid, Left Rear Solenoid harness is open or shorted, Left 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 1,058
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 30, 2020
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Code C0587 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 C0587 Buick - Left Rear Solenoid Circuit Low - AutoCodes.com
C0587 Buick Code - Left Rear Solenoid Circuit Low

What are the Possible Causes of the DTC C0587 Buick?

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

How to Fix the DTC C0587 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 C0587 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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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 C0587 Buick Code

1. What does the OBDII code C0587 mean on a Buick?

Code C0587 indicates a problem with the left rear solenoid circuit, specifically that the voltage is too low.

2. What are the common symptoms of code C0587?

Symptoms may include a warning light on the dashboard, suspension issues like uneven ride height, and decreased vehicle stability.

3. What causes code C0587 on a Buick?

Common causes include a faulty solenoid, damaged wiring or connectors, or a malfunctioning suspension control module.

4. Can a dirty or corroded connector cause code C0587?

Yes, corrosion or dirt on the solenoid circuit connector can disrupt the voltage and trigger this code.

5. How do I diagnose code C0587?

Start by inspecting the wiring and connectors for damage or corrosion, then use a multimeter to check for proper voltage at the solenoid.

6. Does code C0587 affect vehicle performance?

It can affect suspension performance, leading to an uncomfortable ride and potential handling issues, especially on uneven terrain.

7. How can I fix code C0587 on my Buick?

Repairs may involve replacing the left rear solenoid, repairing damaged wiring, or cleaning corroded connectors.

8. Is it safe to drive with code C0587 active?

While the vehicle may still be drivable, suspension issues could affect handling and safety, especially at higher speeds or on rough roads.

9. How much does it cost to repair code C0587?

Repair costs vary depending on the issue, but replacing the solenoid typically costs between $200 and $500, including labor.

10. Can a suspension control module failure cause code C0587?

Yes, a malfunctioning suspension control module can prevent proper voltage regulation and trigger this code.

Discuss the causes and fixes for C0587 Buick OBDII Code

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