AutoCodes – Buick – C0658 Buick

C0658 Buick Code - Level Control Compressor Circuit High

Quick Answer

The Automatic Level Control compressor is switched ON and OFF using an Electronic Level Control (ELC) compressor relay which is controlled by the Electronic Suspension Control (ESC) module. Common causes include Faulty Level Control Compressor, Level Control Compressor harness is open or shorted, Level Control Compressor 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: C0658 Buick indicates Level Control Compressor Circuit High.
Common causes: Common causes include Faulty Level Control Compressor, Level Control Compressor harness is open or shorted, Level Control Compressor 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 726

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 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0658 Buick Description

The Automatic Level Control compressor is switched ON and OFF using an Electronic Level Control (ELC) compressor relay which is controlled by the Electronic Suspension Control (ESC) module. The ESC module circuitry provides a switched path to ground whenever compressor activity is required. This drive circuit is also continually monitored to determine if the voltage level agrees with the commanded state.

OBDII Code C0658 Buick - Level Control Compressor Circuit High - AutoCodes.com — C0658 Buick Code - Level Control Compressor Circuit High

What does this mean?

What are the Possible Causes of the DTC C0658 Buick?

Faulty Level Control Compressor
Level Control Compressor harness is open or shorted
Level Control Compressor circuit poor electrical connection

How to Fix the DTC C0658 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 C0658 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 C0658 Buick Code

1. What does the OBDII code C0658 on a Buick mean?

C0658 indicates a "Level Control Compressor Circuit High," which means there is an issue with the air suspension system's compressor circuit experiencing excessively high voltage.

2. What are the common symptoms of code C0658 in a Buick?

Symptoms may include a sagging or uneven suspension, warning lights on the dashboard, unusual noises from the compressor, or the air suspension not functioning properly.

3. What causes the C0658 code to appear?

Common causes include a faulty air compressor, damaged wiring or connectors in the compressor circuit, a defective level control module, or a blown fuse.

4. Can I drive my Buick with the C0658 code active?

While the vehicle may still be drivable, the suspension system may not function properly, leading to an uncomfortable ride and potential handling issues. It's best to address the issue promptly.

5. How do I diagnose the C0658 code on my Buick?

Start by inspecting the wiring and connectors for damage or corrosion, checking the compressor's operation, testing the level control module, and verifying the voltage in the circuit.

6. How can I fix the C0658 code on my Buick?

Repairs may include replacing the air compressor, repairing damaged wiring or connectors, replacing the level control module, or addressing any blown fuses in the circuit.

7. Does a faulty level control module cause the C0658 code?

Yes, a malfunctioning level control module can send incorrect signals or fail to regulate the compressor circuit, triggering the C0658 code.

8. How much does it cost to fix the C0658 code on a Buick?

Repair costs can vary but typically range from $200 to $1,000, depending on whether the issue is related to wiring, the compressor, or the level control module.

9. Will resetting the code clear the problem permanently?

Simply clearing the code without fixing the underlying issue will not resolve the problem, and the code is likely to return.

10. Can a weak battery cause the C0658 code in a Buick?

While unlikely, a weak or failing battery can sometimes lead to electrical issues, including abnormal voltage in the compressor circuit. Itâ€™s worth checking the batteryâ€™s condition as part of the diagnostic process.