AutoCodes – Cadillac – C0657 Cadillac

C0657 Cadillac Code - Level Control Compressor Circuit Low

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: C0657 Cadillac indicates Level Control Compressor Circuit Low.
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 1,048

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 C0657 Cadillac 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 C0657 Cadillac - Level Control Compressor Circuit Low - AutoCodes.com — C0657 Cadillac Code - Level Control Compressor Circuit Low

What does this mean?

What are the Possible Causes of the DTC C0657 Cadillac?

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

How to Fix the DTC C0657 Cadillac?

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 C0657 Cadillac 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 C0657 Cadillac Code

1. What are the common symptoms of OBDII code C0657 in a Cadillac related to the Level Control Compressor Circuit Low?

- Common symptoms include the suspension feeling uneven, the vehicle sagging on one side, or the compressor not engaging properly.

2. What are the possible causes of the Level Control Compressor Circuit Low OBDII code in a Cadillac?

- Potential causes may include a faulty compressor, damaged wiring or connectors, a defective compressor relay, or a problem with the compressor control module.

3. How can I diagnose the Level Control Compressor Circuit Low issue in my Cadillac?

- To diagnose this issue, you can start by checking the compressor fuse, inspecting the wiring for any damage, testing the compressor relay, and using a diagnostic tool to scan for error codes.

4. Is it safe to continue driving with the C0657 OBDII code related to the Level Control Compressor Circuit Low in a Cadillac?

- It is not recommended to drive the vehicle with this code as it can affect the suspension system's performance and lead to potential safety issues.

5. How can I repair the Level Control Compressor Circuit Low problem in my Cadillac?

- Repairing this issue may involve replacing the faulty compressor, repairing or replacing damaged wiring or connectors, checking and replacing the compressor relay, or reprogramming the compressor control module.

6. Can a DIY enthusiast fix the Level Control Compressor Circuit Low error in a Cadillac?

- While some basic diagnostic and repair procedures can be performed by DIY enthusiasts, dealing with complex electrical components or modules may require professional assistance.

7. Will resetting the OBDII code C0657 in a Cadillac fix the Level Control Compressor Circuit Low issue?

- Simply resetting the code will not fix the underlying problem causing the error. It is important to diagnose and repair the root cause to resolve the issue permanently.

8. How much does it typically cost to repair the Level Control Compressor Circuit Low problem in a Cadillac?

- The cost of repair can vary depending on the specific issue causing the error, but it may range from a few hundred dollars for simple fixes to over a thousand dollars for more complex repairs involving component replacements.

9. Are there any preventative maintenance tips to avoid encountering the C0657 OBDII code in a Cadillac?

- Regularly inspecting the suspension system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the Level Control Compressor Circuit Low problem from occurring.